Use localrc passthrough for tempest no admin job
Use localrc passthrough for tempest no admin job

This commit switches to using a non-existent devstack-gate option
(which was going to be added in an abandoned patch) to using localrc
passthrough to set the option to disable setting the admin creds in
the tempest.conf for the non-admin job.

Change-Id: I21e874231a2265d0665b147dcbd87138d17352c5

citrix-openstack/project-config,Tesora/tesora-project-config,Tesora/tesora-project-config,coolsvap/project-config,coolsvap/project-config,citrix-openstack/project-config,dongwenjuan/project-config,openstack-infra/project-config,dongwenjuan/project-config,noorul/os-project-config,anbangr/osci-project-config,openstack-infra/project-config,noorul/os-project-config,anbangr/osci-project-config