Bug 35508: Update borrowers.updated_on when modifying a patron's attribute

Bug 35508: Update borrowers.updated_on when modifying a patron's attribute

Currently, if you have patron attributes and modify the values in a patron's account, the patron's updated_on date is not updated. This patch makes the "Updated on" change when a patron attribute is updated.

To test:

1. Create a patron attribute type
   1.1. Go to Administration > Patron attribute types
   1.2. Click New patron attribute
   1.3. Fill out the code and description
   1.4. Click Save

2. Edit a patron (normal)
   2.1. Go to Patrons and find a patron account
   2.2. Click Edit
   2.3. Change a regular field (e.g. Middle name)
   2.4. Click Save

--> Notice the "Updated on" date in the left column has been updated to now

3. Edit a patron attribute
   3.1. In another patron account*, click Edit
   3.2. Change the value of an attribute
   3.3. Click Save

--> Notice the "Updated on" date did not change

4. Apply the patch
   4.1 Repeat step 3.1, 3.2, 3.3

--> Notice the "Updated on" date has now changed

Signed-off-by: Esther <esther@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>