instack-undercloud is no longer in use by the TripleO project. Removing
the code to avoid confusion. Stable branches will continue to be
maintained for their life however no new features should be added.
Change-Id: I63a813c7c1ffd30ca30017133d31a497b77a9a4d
Blueprint: remove-instack-undercloud
In the change to keystone sessions and Mistral client 3.2.0 the
exception raised when fetching an environment that doesn't exist
changed. This adds the new exception but continues to catch the previous
one.
Closes-Bug: #1749186
Change-Id: I304547b9ecabe4e387339c8561bbae8651cd9db6