{ServiceFabric} Refine code to unblock CI Lint

src/azure-cli/azure/cli/command_modules/servicefabric/_sf_utils.py

@@ -13,14 +13,13 @@
 
 
 def _get_resource_group_by_name(cli_ctx, resource_group_name):
+    from msrestazure.azure_exceptions import CloudError
     try:
         resource_client = resource_client_factory(cli_ctx).resource_groups
         return resource_client.get(resource_group_name)
-    except Exception as ex:  # pylint: disable=broad-except
-        azureError = getattr(ex, 'Azure Error', ex)
-        if hasattr(azureError, 'error') and hasattr(azureError.error, 'error'):
-            if azureError.error.error == 'ResourceGroupNotFound':
-                return None
+    except CloudError as ex:
+        if ex.status_code == 404:
+            return None
         raise