Bug 30621: Add author column to opac-readingrecord.tt

Bug 30621: Add author column to opac-readingrecord.tt

To test:
1. Have a patron with some checkout history.
2. Go to that patrons OPAC reading history page, notice author is listed in the same column as title. You cannot sort by author.
3. Apply patch and look again.
4. Now there should be an author column that allows patrons to sort by it.

Signed-off-by: Andrew Auld <andrew.auld@ptfs-europe.com>
Signed-off-by: Aleisha Amohia <aleishaamohia@hotmail.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>