Bug 21121: Added new system preference to control hiding of personal patron informati...

Bug 21121: Added new system preference to control hiding of personal patron information in the circulation page

Libraries may want to hide personal patron data from the circulation
page for privacy reasons this syspref introduces that ability for
library staff to control the display of this data themselves without
having to ask support vendors to hide it for them.

Test plan:
1. View circulation page and input a patrons barcode or name
2. Notice if the patron has a phone number, email, street address and
   city set then these are displayed in the left hand side of the screen
   under the patrons name. Otherwise if all/any of these fields are not
   set for the patron then the text: "No <datafield> stored." is
   displayed.
3. Apply this patch
4. Run ./updatedatabase.pl from the Koha shell to run the atomicupdate
5. Restart memcached and plack
6. Notice a new systempreference named
   'HidePersonalPatronDetailOnCirculation' has been added, which has the
   default value 'Dont'
7. Without changing the default value notice the personal patron
   information is still displayed on the circulation page
8. Change the value of the syspref to 'Do' and now notice the phone
   number, email address, street address and city are now hidden in the
   circulation page

Sponsored-By: Catalyst IT
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>