Use a job-template for the tripleo jobs

Now that we are setting the tripleo control variables in tripleo-ci we
can use a template for all of the tripleo jobs as the only difference
between them is the job name.

This will slightly increase the timeout for the undercloud jobs but the
impact of this side effect should be minimal.

Change-Id: I532d79e260e44e95d72e2372b1afb801c3bddf4d
Merge "Use a job-template for the tripleo jobs"