Bug 22743: Add password modal to overdrive results page

Bug 22743: Add password modal to overdrive results page

This patch also removes a line abotu ratings which was throwing an error.
Confirm stars rating for OD results are still shown as expected

To test:
 1 - Enable overdrive circulation with password required
 2 - Sign in to OPAC but not overdrive
 3 - Perform a search that returns overdrive results
 4 - Click in to results page
     http://localhost:8080/cgi-bin/koha/opac-overdrive-search.pl?q=cats
 5 - Note 'Login to OverDrive account' link
 6 - Click it
 7 - Nothing happens!
 8 - Apply patch
 9 - Repeat
10 - Success!

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>