Spanner: Suppress checking 'cov-fail-under' in nox default session (via synth).

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Here's the log from Synthtool:

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/spanner/synth.py. synthtool > Ensuring dependencies. synthtool > Pulling artman image. latest: Pulling from googleapis/artman Digest: sha256:9d5cae1454da64ac3a87028f8ef486b04889e351c83bb95e83b8fab3959faed0 Status: Image is up to date for googleapis/artman:latest synthtool > Cloning googleapis. synthtool > Running generator for google/spanner/artman_spanner.yaml. synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-v1. synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/spanner/v1/mutation.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-v1/google/cloud/spanner_v1/proto/mutation.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/spanner/v1/spanner.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-v1/google/cloud/spanner_v1/proto/spanner.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/spanner/v1/type.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-v1/google/cloud/spanner_v1/proto/type.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/spanner/v1/keys.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-v1/google/cloud/spanner_v1/proto/keys.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/spanner/v1/result_set.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-v1/google/cloud/spanner_v1/proto/result_set.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/spanner/v1/transaction.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-v1/google/cloud/spanner_v1/proto/transaction.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/spanner/v1/query_plan.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-v1/google/cloud/spanner_v1/proto/query_plan.proto synthtool > Placed proto files into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-v1/google/cloud/spanner_v1/proto. synthtool > Replaced 'import google.api_core.grpc_helpers\n' in google/cloud/spanner_v1/gapic/transports/spanner_grpc_transport.py. synthtool > Replaced 'from google.cloud.spanner_v1.proto import spanner_pb2_grpc\n' in google/cloud/spanner_v1/gapic/transports/spanner_grpc_transport.py. synthtool > Replaced '(\\s+)return google.api_core.grpc_helpers.create_channel\\(\n' in google/cloud/spanner_v1/gapic/transports/spanner_grpc_transport.py. synthtool > Replaced 'from google.cloud import spanner_v1' in tests/unit/gapic/v1/test_spanner_client_v1.py. synthtool > Running generator for google/spanner/admin/instance/artman_spanner_admin_instance.yaml. synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-admin-instance-v1. synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/spanner/admin/instance/v1/spanner_instance_admin.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-admin-instance-v1/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin.proto synthtool > Placed proto files into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-admin-instance-v1/google/cloud/spanner_admin_instance_v1/proto. synthtool > Replaced "'google-cloud-spanner-admin-instance'" in google/cloud/spanner_admin_instance_v1/gapic/instance_admin_client.py. synthtool > Replaced 'from google\\.cloud\\.spanner\\.admin\\.instance_v1.proto' in google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin_pb2_grpc.py. synthtool > Replaced '====*' in google/cloud/spanner_v1/proto/transaction_pb2.py. synthtool > Replaced '----*' in google/cloud/spanner_v1/proto/transaction_pb2.py. synthtool > Replaced '~~~~*' in google/cloud/spanner_v1/proto/transaction_pb2.py. synthtool > Running generator for google/spanner/admin/database/artman_spanner_admin_database.yaml. synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-admin-database-v1. synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/spanner/admin/database/v1/spanner_database_admin.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-admin-database-v1/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin.proto synthtool > Placed proto files into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/spanner-admin-database-v1/google/cloud/spanner_admin_database_v1/proto. synthtool > Replaced "'google-cloud-spanner-admin-database'" in google/cloud/spanner_admin_database_v1/gapic/database_admin_client.py. synthtool > Replaced 'from google\\.cloud\\.spanner\\.admin\\.database_v1.proto' in google/cloud/spanner_admin_database_v1/proto/spanner_database_admin_pb2_grpc.py. .coveragerc .flake8 MANIFEST.in noxfile.py.j2 setup.cfg synthtool > Replaced 'include README.rst LICENSE\n' in MANIFEST.in. Running session blacken Creating virtualenv using python3.6 in .nox/blacken pip install black black docs google tests noxfile.py setup.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_admin_database_v1/gapic/enums.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_admin_database_v1/gapic/database_admin_client_config.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_admin_database_v1/gapic/transports/database_admin_grpc_transport.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_admin_instance_v1/gapic/enums.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_admin_instance_v1/gapic/instance_admin_client_config.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_admin_instance_v1/gapic/transports/instance_admin_grpc_transport.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_admin_instance_v1/gapic/instance_admin_client.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_admin_database_v1/gapic/database_admin_client.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/gapic/enums.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/gapic/spanner_client_config.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/gapic/transports/spanner_grpc_transport.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/keys_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/gapic/spanner_client.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/mutation_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/mutation_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/query_plan_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/keys_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/result_set_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/query_plan_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/result_set_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/spanner_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/transaction_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/type_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/type_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/transaction_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/noxfile.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/tests/unit/gapic/v1/test_database_admin_client_v1.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/tests/unit/gapic/v1/test_instance_admin_client_v1.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/tests/unit/gapic/v1/test_spanner_client_v1.py reformatted /tmpfs/src/git/autosynth/working_repo/spanner/google/cloud/spanner_v1/proto/spanner_pb2.py All done! ✨ 🍰 ✨ 34 files reformatted, 54 files left unchanged. Session blacken was successful. synthtool > Cleaned up 2 temporary directories. synthtool > Wrote metadata to synth.metadata. 

[busunkim96]

Firestore & Spanner: Unrelated system test failure.
Scheduler: Cannot checkout non-mergeable PR as if merged Kokoro flakiness.