Bug 23808: (follow-up) Display card number in 'Guarantor information' in memberentry.pl

Bug 23808: (follow-up) Display card number in 'Guarantor information' in memberentry.pl

Instead of displaying 'Patron #' and displaying the guarantor's borrowernumber
in 'Guarantor information' we should display 'Patron card number:' with
the cardnumber displayed as that value is more meaningful to librarians.
The hyperlink containing the borrowernumber should stay the same so that
librarians can easily visit the patron record of existing guarantor
patrons.

Test plan:

1. Apply first patch and follow it's test plan
2. On an Adult patrons record select 'Add guarantee'
3. In 'Guarantor information' section of memberentry.pl observe in the
   pre-filled guarantor information there is a line 'Patron #:' with a
   link displaying a borrowernumber (not card number) and when you click
   on the link it takes you to the adult/guarantors patron account
4. Select 'Search to add' and search and add another guarantor
5. Observe in the added guarantor 'Patron #:' is displayed along with the
   borrowernumber (not card number). The borrowernumber displayed in not
   a link.
6. Apply this patch
7. On a adults patron select 'Add guarantee'
8. Observe in 'Guarantor information' section the pre-filled guarantor now
   has 'Patron card number:' displayed (instead of 'Patron #:', and it's
   link now displays the guarantors cardnumber.
   Clicking on the link still takes you to the guarantors patron account
9. Repeat step 4
10. Observe in the added guarantor they also have 'Patron card number:'
    (instead of 'Patron #:'). A cardnumber rather than borrowernumber is
    displayed. The cardnumber is not a link.
11. Confirm tests still pass:
    sudo koha-shell <instancename>
    prove xt
    prove t

Sponsored-by: South Taranaki District Council, NZ
Signed-off-by: Andreas Roussos <a.roussos@dataly.gr>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>