Fixed catalog db connection

deploy/aro/infrastructure/azure-pipelines.yml

@@ -20,7 +20,7 @@ stages:
         displayName: 'Infrastructure Deployment'
         variables:
           SqlHostName: $[format('mssql-server-linux.{0}.svc', variables['OpenShiftProject'])]
-          CatalogDbConnection: $[format('Server={0};Database=Microsoft.eShopOnContainers.Services.CatalogDb;User Id={1};Password={2}', variables['SqlHostName'], variables['SqlUsername'], variables['SqlPassword'])]
+          CatalogDbConnection: 'Server=$(SqlHostName);Database=Microsoft.eShopOnContainers.Services.CatalogDb;User Id=$(SqlUsername);Password=$(SqlPassword)'
           IdentityDbConnection: $[format('Server={0};Database=Microsoft.eShopOnContainers.Services.IdentityDb;User Id={1};Password={2}', variables['SqlHostName'], variables['SqlUsername'], variables['SqlPassword'])]
           MarketingDbConnection: $[format('Server={0};Database=Microsoft.eShopOnContainers.Services.MarketingDb;User Id={1};Password={2}', variables['SqlHostName'], variables['SqlUsername'], variables['SqlPassword'])]
           OrderingDbConnection: $[format('Server={0};Database=Microsoft.eShopOnContainers.Services.OrderingDb;User Id={1};Password={2}', variables['SqlHostName'], variables['SqlUsername'], variables['SqlPassword'])]