Updated openstack/openstack
Project: openstack/heat  c1b3eb22f7ab6ea60b095f88982247dd249139bf

Record the updated_time for nested_stack

Record the updated_time for nested_stack when updating.

Change-Id: Ia22051b05f26d9a1d02fba6c04e40dda3cd572ea
Closes-bug: #1384594