New reprioritize/requeue action

[ldang]

Per hysds/hysds-framework#5

Our customers have requested the ability to send a job to a different queue, in addition to assigning them a different priority.

• Allow user to specify an arbitrary queue
• If the user chooses to, allow the user to specify an arbitrary priority.
• Reset the retry counter to 0.

The rationale for resetting the retry counter is that its purpose is to limit automated retries.
The use case here is that the user is reprioritizing an existing job or assigning it to a different queue. The user should not have to worry about the retry counter or how the automated retries would be affected.