Add environment variable for service_name in apigee-build.yml check workspace step

Author: sathiya-nhs

azure/common/apigee-build.yml

@@ -51,10 +51,12 @@ jobs:
 
     steps:
       - bash: |
-          if [ -n "$(ls -A "$(Pipeline.Workspace)/s/$(service_name)" 2>/dev/null)" ]; then
+          if [ -n "$(ls -A "$(Pipeline.Workspace)/s/$service_name" 2>/dev/null)" ]; then
             echo "workspace directory is not empty!"
             exit 1
           fi
+        env:
+          service_name: ${{ parameters.service_name }}
         displayName: "check workspace is clean"
 
       - bash: |