Bug 38266: (bug 21083 follow-up) Increment after comparison

Bug 38266: (bug 21083 follow-up) Increment after comparison

To test:
 1 - Define a patron attribute as repeatable
 2 - Add multiple values to a patron (I used borrowernumber 5)
 3 - Tools->Batch patron modification
 4 - Modify the patron from step 1, selecting the attribute you created and checking the box to clear
 5 - View the patron, they look correct
 6 - Check the DB:
    SELECT * FROM borrower_attributes WHERE borrowernumber=5;
 7 - There is one blank value
 8 - Apply patch
 9 - Repeat batch modification
10 - Check the DB, no attribute!
11 - Test with multiple attributes in the batch modification and ensure only the correct one is removed
12 - Sign off

Signed-off-by: Phil Ringnalda <phil@chetcolibrary.org>
Signed-off-by: Emily Lamancusa <emily.lamancusa@montgomerycountymd.gov>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>