Ability to cancel batch

[sroosa]

Description:

As an ingester, I can cancel a batch I have initiated, so that I can save time if I realize a batch is failing hard

Does the cancel action stop where the batch is at, and items that have successfully completed are retained? Or should everything in the batch object, including items that were successful, be rolled back/deleted?

Done Looks Like:

• Cancel batch button on the batch details page
• Cancel batch button on the batch's line of the batch dashboard
• Cancel batch buttons causes
  - request for confirmation from user
  - remaining items in the batch to become "cancelled"
  - currently running item continues to run
  - before starting to run another batch item, check status to see if it has been cancelled or is still enqueued; only run it if it is enqueued.
  - set the status for those batch item cancelled
  - sets the batch status to cancelled

[mcwhitaker]

@sroosa Sadie, shouldn't the batch status be set to cancelled instead of failed?