tree bdf82eb2cdad61e0a1d61b97d08c9362de8a2027
parent 0ca6461abd7949b7940a968efb68399ffc88c6c1
author James E. Blair <jeblair@redhat.com> 1500656569 -0700
committer James E. Blair <jeblair@redhat.com> 1500656569 -0700

Undefine Zuul variables in Ansible when appropriate

When variables such as branch, tag, oldrev, and newrev are not
applicable, ensure that they are not defined at all as Ansible
variables.

Update the documentation to be more clear on oldrev and newrev.

Change-Id: I56d9a6496467de2f328eb9a43cc52c5f7ef73310