Merge "Update some cases of iterating stack resources"

heat/engine/resources/instance.py

@@ -45,7 +45,7 @@ class Restarter(signal_responder.SignalResponder):
         Return the resource with the specified instance ID, or None if it
         cannot be found.
         '''
-        for resource in self.stack:
+        for resource in self.stack.itervalues():
             if resource.resource_id == resource_id:
                 return resource
         return None

heat/engine/service.py

@@ -712,7 +712,7 @@ class EngineService(service.Service):
                 action(details=details)
 
             stk = parser.Stack.load(stack_context, stack=stack)
-            for res in stk:
+            for res in stk.itervalues():
                 res.metadata_update()
 
         for wr in wrs: