LP#1748265 SMS Carrier not an option in the patron's list of holds.

LP#1748265 SMS Carrier not an option in the patron's list of holds.

Adds SMS Carrier name as an option in the patron's list of holds.

To test:
1. Set 'Enable features that send SMS text messages' in the Library Settings to true.
2. Place a few holds for a patron, selecting text message notification.
3. Go to the patron's record and view their holds.
4. Display the 'Notifications SMS Carrier' column to view the carrier name.

Signed-off-by: Garry Collum <gcollum@gmail.com>
Signed-off-by: Dawn Dale <ddale@georgialibraries.org>
Signed-off-by: Bill Erickson <berickxx@gmail.com>