Cache Yarn Packages on build

Signed-off-by: Robin Dadswell <robin@dadswell.email>

azure-pipelines.yml

@@ -697,17 +697,6 @@ stages:
           chmod a+x ${TESTSFOLDER}/test.sh
           ${TESTSFOLDER}/test.sh ${OSNAME} Automation Test
         displayName: Run Automation Tests
-      - task: CopyFiles@2
-        displayName: 'Copy Screenshot to: $(Build.ArtifactStagingDirectory)'
-        inputs:
-          SourceFolder: '$(Build.SourcesDirectory)'
-          Contents: |
-            **/*_test_screenshot.png
-          TargetFolder: '$(Build.ArtifactStagingDirectory)/screenshots'
-      - publish: $(Build.ArtifactStagingDirectory)/screenshots
-        artifact: '$(osName)AutomationScreenshots'
-        condition: and(succeeded(), eq(variables['System.JobAttempt'], '1'))
-        displayName: Publish Screenshot Bundle
       - task: PublishTestResults@2
         inputs:
           testResultsFormat: 'NUnit'
@@ -791,6 +780,9 @@ stages:
 
     - job: Analyze_Backend
       displayName: Backend
+      dependsOn: Prepare
+      condition: and(succeeded(), eq(dependencies.Prepare.outputs['setVar.backendNotUpdated'], '0'))
+
       variables:
         disable.coverage.autogenerate: 'true'
       pool: