The template generated by ResourceGroup should include outputs that
reference any needed resource attributes. However, previously it only did
so when rolling updates were not enabled by an update_policy.
The tests are trivially different than the patch on master, only because
ce120bfda8 is not present in Pike.
Change-Id: Ice7a92fe8d2b14e2470d9089a8e191c8385994f1
Closes-Bug: #1741981
Partial-Bug: #1731349
Related-Bug: #1660831
(cherry picked from commit 7a046e6ffd)