Bug 18621: Added in value attribute to dateexpiry field

Bug 18621: Added in value attribute to dateexpiry field

Test plan:
1. Create a patron category with the dateexpiry value of 29/9/2017

2. Create a patron user from that patron category (which I'll refer to as patron A) with the date
expiry value of 1/10/2017 and submit the form

3. Notice that the manual dateexpiry you have submitted is correctly
displayed

4. Create a duplicate patron with the same firstname and surname and
patron A, and set the date expiry value of 1/10/2017 and submit the form

5. The form displays a duplicate patron message. Notice that the dateexpiry input box is empty now

6. Select the new member (not a duplicate member) option in the
messagebox

7. The form successfully submits and notice that the date expiry value
displayed is that of the patron category (i.e. it is 29/9/2017) not the
dateexpiry value of 1/10/2017 that you manually set for this patron

8. Apply patch

9. Repeat step 4

10. The form displays a duplicate patron message. Notice the dateexpiry input box still
contains the value you entered which is 1/10/2017. Select the new member
(not a duplicate member) option in the messagebox

11. The form successfully submits and notice that the date expiry value
displayed is 1/10/2017 that you manually set for this patron

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>