Bug 6739: make it possible to block expired patrons from OPAC actions

Bug 6739: make it possible to block expired patrons from OPAC actions

Test Plan:
 1) Apply patch
 2) Run updatedatabase.pl
 3) Pick a patron, note the patron's category
 5) Issue an item to this patron
 4) Edit that category, set "Block expired patrons" to "Block"
 5) Verify the patron cannot renew or place holds in the OPAC
 6) Edit the category again, set "Block expired patrons" to
    "Don't block"
 7) Verify the patron *can* renew and place holds in the OPAC
 8) Edit the category again, set "Block expired patrons" to
    "Follow system preference BlockExpiredPatronOpacActions"
 9) Set the system preference BlockExpiredPatronOpacActions to
    "Block"
10) Verify the patron cannot renew or place holds in the OPAC
11) Set the system preference BlockExpiredPatronOpacActions to
    "Don't block"
12) Verify the patron *can* renew and place holds in the OPAC

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Melia Meggs <melia@bywatersolutions.com>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Testing notes on last patch in series.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>