Add action_wait_secs for update

Add action_wait_secs for TestResource in api tests, so
that consecutive updates would have different updated_time.

Change-Id: I08d2ac6625acaa0828b18b5e805c81031bb87c01
Related-Bug: #1721692
diff --git a/api/gabbits/stacks.yaml b/api/gabbits/stacks.yaml
index f37f7a1..39552b0 100644
--- a/api/gabbits/stacks.yaml
+++ b/api/gabbits/stacks.yaml
@@ -106,6 +106,8 @@
           type: OS::Heat::TestResource
           properties:
             value: {get_param: test_val}
+            action_wait_secs:
+              update: 1
       outputs:
         output_value:
           value: {get_attr: [test, output]}