Generalize Scheduler Configs

[Paul-Ferrell]

Scheduler configuration should consist of a single 'schedule' section, with a common set of configuration settings that are applicable across most schedulers.

• Each scheduler should know what settings it uses.
• Attributes that are set but not used should result in a 'warning' written to the kickoff.log file.
• Schedulers may still have custom settings. They will go under
  schedule['<sched_name>'].