Cleanup the job templates
Cleanup the job templates

openstack-python3-ussuri-jobs has the py36/py37/pep8 jobs defined
and should be used for the current master since when we branch
for ussuri, this will be correct.

Change-Id: I9413dcf5d865054e8ce70be8f743cc06800e73fb

openstack/python-tripleoclient