The tripleo-puppet-standalone template is not really used in any
module repos, because each repo defines its own standalone job.
Conflicts:
zuul.d/tripleo.yaml
Backport note:
stable/xena and yoga are skipped because tripleo jobs have been removed
from these branches.
Change-Id: I8525806576e1108a936e5b036859671794f304de
(cherry picked from commit 4a70a28935)
(cherry picked from commit b695e7dc5d)
a231f0f185