Fix function deletion

When deleting function, we should remove all the allocated resources
in the orchestrator, no matter what kind of source the function is
using.

Change-Id: I7ee3d1bb1e6b417194a1b86606f8fcd64cb598cf

qinling/api/controllers/v1/function.py

@@ -176,10 +176,9 @@ class FunctionsController(rest.RestController):
 
             if source == 'package':
                 self.storage_provider.delete(context.get_ctx().projectid, id)
-            if source == 'image':
-                # If it's image function, need to delete all resources created
-                # by orchestrator asynchronously.
-                self.engine_client.delete_function(id)
+
+            # Delete all resources created by orchestrator asynchronously.
+            self.engine_client.delete_function(id)
 
             # This will also delete function service mapping as well.
             db_api.delete_function(id)

qinling/orchestrator/kubernetes/manager.py

@@ -324,7 +324,7 @@ class KubernetesManager(base.OrchestratorBase):
 
             return {'result': output}
 
-    def delete_function(self, function_id, labels=[]):
+    def delete_function(self, function_id, labels=None):
         selector = common.convert_dict_to_string(labels)
 
         ret = self.v1.list_namespaced_service(