Bug 21772: Move OPAC holds and account tables into .inc

Bug 21772: Move OPAC holds and account tables into .inc

This patch moves the code to render the account and holds information
for the patron into include files. They are loaded in the opac-user.tt
and opac-account.tt templates respectively.

To test:
1) Have a patron with account lines and holds
2) Notice they are displayed in the patron's detail section in the OPAC
3) Apply this patch
4) Reload the patron's detail page
=> SUCESS: Everything looks the same, no behaviuor or layout change.
5) Sign off

Sponsored-by: City of Portsmouth Public Library
Signed-off-by: Sarah Cornell <sbcornell@cityofportsmouth.com>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>