move osc-plugin-job from experimental to check
move osc-plugin-job from experimental to check

the osc-plugin-job has been tested on various patches in osc, and
it has proven stable enough to be included as a check job.

Change-Id: I78c868e6a8000eafe6ec40b21937061b2f5f4380

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