Bug 13931 - Date of birth in patron search result and in autocomplete

Bug 13931 - Date of birth in patron search result and in autocomplete

Test plan:
1) Apply the patch
2) Type into search form patron's name & check his date of birth in
   autocompletion
3) Go to intranet/cgi-bin/koha/members/member.pl & submit
   a search with more than one result .. now should in the table appear
   patron's date of birth
4) Try show/hide columns section if it works correctly for date of birth
5) Go to intranet/cgi-bin/koha/admin/columns_settings.pl -> go to
   patrons section & check there is dateofbirth & it's functionality

Signed-off-by: Frederic Demians <f.demians@tamil.fr>
  Works as described. Syspref dateformat respected. Column dateofbirth
  configurable, but mandatory on autocompletion search result.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>