More Granular Scheduler Management APIs Required

[jas34]

As of today Scheduler Management offers only three APIs:

1. GET /scheduler/managers - returns list of scheduler managers
2. GET /scheduler/scheduled/workflows - returns a list of scheduled workflows based on (name and managerId and nodeAddress) or schedulerId
3. GET /scheduler/scheduled/workflows/executions - returns a list of scheduled job executions based on (name and managerId and nodeAddress) or schedulerId

New APIs required for easy navigation by admin:

1. GET /scheduler/managers/nodes - returns a list of nodes on which the scheduler manager is currently running.
2. GET /scheduler/scheduled/jobs - returns a list of jobs currently running on each node of the cluster.
3. GET /scheduler/scheduled/jobs/{nodeAddress} - returns a list of jobs currently running on a node of the cluster.