VED-153: Ensure PR teardown pipeline works for closed PRs.

Author: mfjarvis

azure/azure-pr-teardown-pipeline.yml

@@ -22,7 +22,7 @@ jobs:
       name: 'AWS-ECS'
       vmImage: 'ubuntu-latest'
     steps:
-      - checkout: self
+      - checkout: self@master
 
       - bash: |
           echo $(action_pr_number)
@@ -51,4 +51,4 @@ jobs:
           terraform workspace select $(WORKSPACE)
           make init && make destroy aws_account_no=${account_id} environment=$(WORKSPACE)
         displayName: Destroy terraform PR workspace and linked resources
-        retryCountOnTaskFailure: 2
+        retryCountOnTaskFailure: 2