Remove loggers and add lifecycle events for jobs

[Mike Diarmid]

At the moment we've added logging for processes running in Kubernetes pods everywhere, for creation, completion and failures of jobs. Instead this should be down to the user to add - to do this we need to add in lifecycle events for jobs, I propose the following:

• beforeCreate
  • async with callback - return original job or modified job.
• afterCreate
  • Just plain events, no interaction with jobs.
• onSuccess
  • Just plain events, no interaction with jobs.
• onRelayCancelled
  • Just plain events, no interaction with jobs.
• onRetry
  • Just plain events, no interaction with jobs.
• onFailure
  • Just plain events, no interaction with jobs.

[Elliot Hesp]

Hook lifecycle events:

• beforeCreate
• afterCreate
• onJobSuccess
• onJobFailure
• onRelayStepSuccess
• onRelayStepCancelled
• onJobRetry

Job events:

• onSuccess
• onFailure
• onRetry
• onRelayStepSuccess
• onRelayStepCancelled