Bug 30039: Add published on column to claims.pl

Bug 30039: Add published on column to claims.pl

To test:
1. Have a vendor setup
2. Go to serials and add a new serial w/ that vendor.
3. When creating a serial make this first issues sometime in the past.
4. Go to Claims, choose your vendor and load the table.
5. No published on column.
6. Apply patch
7. Try step 4 again and now you should see a published on column.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>