Add python jobs to gear.

Also remove tarball jobs from projects that invoke
python-jobs, since it's included.

Change-Id: Ia6b02a1e647595672fdd53364d71f811d4749eeb
Reviewed-on: https://review.openstack.org/26413
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins