Bug 23352: (follow-up) Fixes for QA review

Bug 23352: (follow-up) Fixes for QA review

Test plan:
1. Confirm that
installer/data/mysql/atomicupdate/bug_23352-add_ccode_column_to_subscriptions_table.pl
has the exec flag

2. Create a subscription. Notice the 'Collection' dropdown defaults to
the 'None' option - same as Location

3. Save the subscription without changing the 'None' collection

4. Receive the serial and confirm the 'Collection' field is empty

5. Create a second subscription. Change the 'Collection' dropdown to
'Fiction', then save the subscription

6. Receive the serial and confirm the 'Collection' dropdown is set to
'Fiction'

7. Confirm that the 'Collection code' terminology in the template is replaced with
'Collection'

Sponsored-By: Brimbank Library, Australia
Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>