Expose create time in stack resource list:

* This will help with identified when the stack resource was created and when it was updated

   * Unity with the output of stack list

Change-Id: I48bc387ea7e5855fc37d94c0fee12496692a21c1

heat/engine/api.py

@@ -183,8 +183,10 @@ def format_stack_resource(resource, detail=True, with_props=False,
     expectations.
     '''
     last_updated_time = resource.updated_time or resource.created_time
+    created_time = resource.created_time
     res = {
         rpc_api.RES_UPDATED_TIME: timeutils.isotime(last_updated_time),
+        rpc_api.RES_CREATION_TIME: timeutils.isotime(created_time),
         rpc_api.RES_NAME: resource.name,
         rpc_api.RES_PHYSICAL_ID: resource.resource_id or '',
         rpc_api.RES_ACTION: resource.action,

heat/rpc/api.py

@@ -59,14 +59,14 @@ STACK_OUTPUT_KEYS = (
 )
 
 RES_KEYS = (
-    RES_DESCRIPTION, RES_UPDATED_TIME,
+    RES_DESCRIPTION, RES_CREATION_TIME, RES_UPDATED_TIME,
     RES_NAME, RES_PHYSICAL_ID, RES_METADATA,
     RES_ACTION, RES_STATUS, RES_STATUS_DATA,
     RES_TYPE, RES_ID, RES_STACK_ID, RES_STACK_NAME,
     RES_REQUIRED_BY, RES_NESTED_STACK_ID, RES_NESTED_RESOURCES,
     RES_PARENT_RESOURCE,
 ) = (
-    'description', 'updated_time',
+    'description', 'creation_time', 'updated_time',
     'resource_name', 'physical_resource_id', 'metadata',
     'resource_action', 'resource_status', 'resource_status_reason',
     'resource_type', 'resource_identity', STACK_ID, STACK_NAME,

heat/tests/test_engine_api_utils.py

@@ -68,6 +68,7 @@ class FormatTest(common.HeatTestCase):
         res = self.stack['generic1']
 
         resource_keys = set((
+            rpc_api.RES_CREATION_TIME,
             rpc_api.RES_UPDATED_TIME,
             rpc_api.RES_NAME,
             rpc_api.RES_PHYSICAL_ID,
@@ -194,6 +195,7 @@ class FormatTest(common.HeatTestCase):
         res.nested.return_value = None
 
         resource_keys = set((
+            rpc_api.RES_CREATION_TIME,
             rpc_api.RES_UPDATED_TIME,
             rpc_api.RES_NAME,
             rpc_api.RES_PHYSICAL_ID,