remove upgrade ci jobs for ci.centos.org
remove upgrade ci jobs for ci.centos.org

Add discuss previoulsy in the upstream tripleo ci meeting
related to upgrade, we decide to drop the current upgrade
jobs (periodics) on centos-ci, since the workflow is too
big and the duration to long for the infra of centos.ci
The effort will be concentrate to the upstream tripleo-ci
jobs for Newton to Ocata (composable upgrade). This workflow
will be apply also in tripleo-quickstart to build composable
upgrade ci jobs on centos ci.
See for more informations:
https://etherpad.openstack.org/p/tripleo-upgrade-jobs

Note: the builder, job-template is not removed in this
review because it could re-used in a near futur for
implementing composable upgrade with tripleo-quickstart

Change-Id: I5a8e4a2b7e400e44b68532a8fac3e3e8a667cc2c

redhat-openstack/rdo-infra,rdo-infra/ci-config,rdo-infra/ci-config,rdo-infra/ci-config,redhat-openstack/rdo-infra,redhat-openstack/rdo-infra,redhat-openstack/rdo-infra,rdo-infra/ci-config