Add succeeded check to set pipeline subnet info step

Author: benbp

eng/common/TestResources/build-test-resource-config.yml

@@ -16,7 +16,7 @@ parameters:
 steps:
   - task: AzurePowerShell@5
     displayName: Set Pipeline Subnet Info
-    condition: ne(variables['Pool'], '')
+    condition: and(succeeded(), ne(variables['Pool'], ''))
     env: ${{ parameters.EnvVars }}
     inputs:
       azureSubscription: azure-sdk-tests