Bug 16299 - Use validation plugin when creating a patron attribute type

Bug 16299 - Use validation plugin when creating a patron attribute type

This patch replaces custom client-side form validation with use of the
jQuery validation plugin. Besides reducing the amount of code in the
template, this allows us to eliminate use of "onclick."

This patch also makes a correction for HTML validity: <option value=""
/> is not accepted. I have also added an id attribute to a <select>
which lacked it.

To test, apply the patch and go to Administration -> Patron attribute
types.

- Test creating a new patron attribute type. Try to submit the form
  without a code, description, or both. You should be prevented from
  doing so.
- Test editing an existing patron attribute type. You should not be able
  to remove the description and have it save successfully.

Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>