bpo-38089: Move Azure Pipelines to latest VM versions and make macOS tests optional (GH-15851)

(cherry picked from commit 801f925998)

Co-authored-by: Steve Dower <steve.dower@python.org>

.azure-pipelines/ci.yml

@@ -42,7 +42,7 @@ jobs:
     testRunPlatform: macos
 
   pool:
-    vmImage: xcode9-macos10.13
+    vmImage: macos-10.14
 
   steps:
   - template: ./macos-steps.yml
@@ -131,7 +131,7 @@ jobs:
   condition: and(succeeded(), eq(dependencies.Prebuild.outputs['tests.run'], 'true'))
 
   pool:
-    vmImage: vs2017-win2016
+    vmImage: windows-2019
 
   strategy:
     matrix:

.azure-pipelines/macos-steps.yml

@@ -14,6 +14,8 @@ steps:
 
 - script: make buildbottest TESTOPTS="-j4 -uall,-cpu --junit-xml=$(build.binariesDirectory)/test-results.xml"
   displayName: 'Tests'
+  continueOnError: true
+  timeoutInMinutes: 30
 
 - task: PublishTestResults@2
   displayName: 'Publish Test Results'

.azure-pipelines/pr.yml

@@ -40,7 +40,7 @@ jobs:
     testRunPlatform: macos
 
   pool:
-    vmImage: xcode9-macos10.13
+    vmImage: macos-10.14
 
   steps:
   - template: ./macos-steps.yml
@@ -131,7 +131,7 @@ jobs:
   condition: and(succeeded(), eq(dependencies.Prebuild.outputs['tests.run'], 'true'))
 
   pool:
-    vmImage: vs2017-win2016
+    vmImage: windows-2019
 
   strategy:
     matrix:

Misc/NEWS.d/next/macOS/2019-09-10-14-24-35.bpo-38089.eedgyD.rst

@@ -0,0 +1 @@
+Move Azure Pipelines to latest VM versions and make macOS tests optional