Updated openstack/openstack
Project: openstack/heat  2aaa28bde121ba51a5d24303c65e2b5f33902cd0
null
heat_keystoneclient raise error if stack user role missing

Modify error path when the required role is not found, so we raise
an error and do not create the user if the required role is not
found.

Change-Id: Idbc8cc5821af8aca1442051a0a6c37e03b2522b9
Closes-Bug: #1277478