PYTHON-1285 - Switch Evergreen OSX distro to 1012

Author: behackett

.evergreen/config.yml

@@ -701,9 +701,9 @@ axes:
  display_name: "Archlinux"
  run_on: archlinux-test
 
- - id: osx-1010
- display_name: "macOS 10.10"
- run_on: osx-1010
+ - id: macos-1012
+ display_name: "macOS 10.12"
+ run_on: macos-1012
 
  - id: solaris
  display_name: "Solaris"
@@ -745,9 +745,9 @@ axes:
  - id: os-ssl-requires-32
  display_name: OS
  values:
- - id: osx-1010
- display_name: "macOS 10.10"
- run_on: osx-1010
+ - id: macos-1012
+ display_name: "macOS 10.12"
+ run_on: macos-1012
 
  # OSes that support versions of MongoDB>=3.4 with SSL.
  - id: os-requires-34