Cancelled data import jobs sometimes continue on to completion

Overview: Import job that a user has manually cancelled will sometimes continue on to completion

Steps to Reproduce:

1. Log into folio-snapshot-load
2. Run a data import job that will take  more than a couple of minutes (so that you will have time to cancel  it). Use a file with ca. 200-500 records.
3. Manually cancel the running data import job by clicking on the trashcan and waiting 10 seconds

Expected Results:

The data  import job stops at the time the cancellation message is received and does not continue on to complete. Also, that the job status at the time of job completion does not change later on.

Actual Results:

Jobs that were shown as canceled went on to complete.  Jobs that were originally marked "completed with errors" later changed to just "completed".

Interested parties: Cornell, MSU

NOTE: Right now, manually stopped jobs may have some records created or updated. We will try to display as much info as possible for those records, but a full solution will need to wait for UXPROD-1383