Add JobService Dashboard API test cases
Added test cases for the following APIs:
1. GET /jobservice/pools/{pool_id}/workers Get workers
2. PUT /jobservice/jobs/{job_id} Stop running jc
3. PUT /jobservice/queues/{job_type} stop and clean, pause, resume pending jobs in the queue
4. GET /jobservice/queues list job queues
5. GET /jobservice/pools Get worker pools
6. GET /schedules List schedules
7. GET /schedules/{job_type}/paused Get scheduler paused status
Signed-off-by: Yang Jiao <jiaoya@vmware.com>
