PYTHON-1658 Test that transaction reads ignore db/collection readConcern (mongodb#384)

Fix: properly skip tests that include 'skipReason'. Revendor transaction spec tests at commit 367842f1ee4b80f75664a05c6b9d5b2498cf856d

Author: ShaneHarvey

test/test_transactions.py

@@ -391,6 +391,9 @@ def end_sessions(sessions):
 
 def create_test(scenario_def, test):
  def run_scenario(self):
+ if test.get('skipReason'):
+ raise unittest.SkipTest(test.get('skipReason'))
+
  listener = OvertCommandListener()
  # New client, to avoid interference from pooled sessions.
  # Convert test['clientOptions'] to dict to avoid a Jython bug using "**"
@@ -561,10 +564,6 @@ def create_tests():
 
  new_test = create_test(scenario_def, test)
  new_test = client_context.require_transactions(new_test)
- new_test = client_context._require(
- lambda: not test.get('skipReason'),
- test.get('skipReason'),
- new_test)
 
  if 'secondary' in test_name:
  new_test = client_context._require(

test/transactions/bulk.json

@@ -184,6 +184,7 @@
  },
  "result": {
  "deletedCount": 4,
+ "insertedCount": 6,
  "insertedIds": {
  "0": 1,
  "3": 3,

test/transactions/error-labels.json

@@ -595,6 +595,7 @@
  }
  }
  ],
+ "cursor": {},
  "readConcern": null,
  "lsid": "session0",
  "txnNumber": {