Bug 17801: Use issuedate for limits in Most Circulated Items

Bug 17801: Use issuedate for limits in Most Circulated Items

To test:
1 - Have two checkouts in old_issues
    issue 1: timestamp 2020-08-01 00:00:00, issuedate 2019-08-01 00:00:00
    issue 2: timestamp 2020-07-01 00:00:00, issuedate 2019-07-01 00:00:00
2 - Perform a Most Circulated Items search for checkout dates 2020-06-01 to 2020-09-01. Both checkouts appear in search
3 - Repeat search with checkout dates 2019-06-01 to 2019-09-01. Neither checkout appears in search
4 - apply patch, restart all
5 - Repeat search with checkout dates 2020-06-01 to 2020-09-01. Neither checkout appears in search
6 - Repeat search with checkout dates 2019-06-01 to 2019-09-01. Both checkouts appears in search

Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>