Dynamic Agent assignment to Classic Agent by order parameter

Current Situation

• If you want that a job is executed on a JobScheduler Agent then you have to assign a process class to the job where the process class specifies the Agent in the remote_scheduler attribute.
• So you have a fix allocation between job and Agent..

Desired Behavior

• The JobScheduler should provide "dynamic Agent assignment" by an order parameter.
• The order parameter has the name scheduler.remote_scheduler
• This order parameter beats the remote_scheduler attribute of an assigned process class for the current task when a task is started.
• The value of this order parameter has to be the same form like the remote_scheduler attribute in a process class otherwise an error is raised.

Maintainer Note

• The order parameter scheduler.remote_scheduler affects only "shell" jobs.
• "API" jobs ignore this order parameter and the task logs a SCHEDULER-484 warning.