Merge pull request #165 from MosesMendoza/maint/master/retry_job_creation

Retry job creation if initial attempts fail
Delete packaging job after repo job has succeeded

This commit deletes the packaging job after the repos have been created. This
will help us avoid running out of space on the jenkins master as well as reduce
clutter before the jobs get cleaned up.

Signed-off-by: Moses Mendoza <moses@puppetlabs.com>
Begin cleanup work