[BACKLOG-195] OEM SchedulerResource refactoring for:

/scheduler/jobState (SchedulerResource.getJobState) BACKLOG-452
/scheduler/pauseJob (SchedulerResource.pauseJob) BACKLOG-453
/scheduler/resumeJob (SchedulerResource.resumeJob) BACKLOG-454
/scheduler/removeJob (SchedulerResource.removeJob) BACKLOG-455
/scheduler/jobinfo (SchedulerResource.getJob) BACKLOG-456
/scheduler/jobinfotest (SchedulerResource.getJobInfo) BACKLOG-457