Revert "Revert "Stop running manage-projects""

This reverts commit f063f71651ff6d676944bd10ed3674351817bdb9.

While we are back to manually running things to work out more bugs stop
running manage-projects automatically. This simplifies the manual
process.

Conflicts:
	modules/openstack_project/manifests/gerrit.pp

Change-Id: Ibd5e8367f732029496323be737df39d406cafc99