Remove juno backwards compat jobs from tempest
Remove juno backwards compat jobs from tempest

The final juno release was just pushed. There is no longer upstream
support for the juno branch, so let's remove the jobs from tempest
since they are no longer needed.

Change-Id: I094d0f95fe74d551c2dce307510a3bf659010c2b

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