Bug 10029 - CAS authentication fails in OPAC reserve

If OPAC reserve page is accessed without being logged-in, login form is displayed as well as a CAS authentication link (if enabled). A click on this link will lead to CAS server but one comming back to Koha, page shows an error : "ERROR: No biblionumber received".
This is because CAS link only contains the query path "/cgi-bin/koha/opac-reserve.pl", not the query parameters.

This patch adds query parameters to URI sent to CAS.

Test plan :
- Enable CAS
- Go to opac without been logged-in
- Try to place hold on a record
=> You get to /cgi-bin/koha/opac-reserve.pl?biblionumber=XXX showing authentication page
=> Check that CAS link contains query param "biblionumber"
- Click on CAS link and log in
=> Check you return well logged-in to reserve page with biblionumber param

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
I have followed the test plan as far as I could and the links
contain the biblionumber now, which they didn't before.
I couldn't check the CAS login, but my normal login worked
as expected.
All tests and the QA script pass.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>