LP#1554714 Patron reg 1.5 controller consolidation

LP#1554714 Patron reg 1.5 controller consolidation

Angular 1.4+ requires that each controller be instantiated via the
module.controller() function.  No more global functions.  The patron
reg. controller, shared by 2 different modules, was defined as a global
function.  Resolve this by hanging it off the core module (when loaded).

Signed-off-by: Bill Erickson <berickxx@gmail.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>