Bug 16099: Make name required field when creating subscription field

Bug 16099: Make name required field when creating subscription field

To test:
1) Notice behaviour when adding subcription field (Serials) without a
   name
2) Apply patch
3) Attempt to create subscription field without a name and click Save
4) Notice that you not cannot submit the form without adding the name

Sponsored-by: Catalyst IT
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com