Do not run constraints jobs on old stable branches
Do not run constraints jobs on old stable branches

We should not attempt to run these jobs on Juno or Kilo.

Change-Id: I4544aa63dad944027978ab72cd23f07d7385bc0c

openstack-infra/project-config,dongwenjuan/project-config,dongwenjuan/project-config,noorul/os-project-config,openstack-infra/project-config,Tesora/tesora-project-config,Tesora/tesora-project-config,noorul/os-project-config