Bug 22655: Adding holds rules to Onboarding tool

Bug 22655: Adding holds rules to Onboarding tool

This patch adds the following fields to the circ rule step in the
onboarding tool:
- holds allowed (total)
- holds allowed (daily)
- holds per record (count)

To test:
1) Apply patch, drop and recreate database, restart memcached and refresh page
2) Go through the installer and get to the final step of the onboarding
tool
3) Confirm the above fields are now available to set in your circulation
rule
4) Save and log in to Koha
5) Go to Admin -> Circ and fines rules
6) Confirm the fields saved correctly

Sponsored-by: Catalyst IT
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>