Bug 13880 - Allow svc/report to be passed sql parameters

Bug 13880 - Allow svc/report to be passed sql parameters

The same feature added to the opac svc/report in bug 9915 should be
added to the staff side.

Test Plan:
1) Apply this patch
2) Create this report:
   SELECT * FROM biblio WHERE biblionumber = <<biblionumber>>
3) Note the id of the report
4) Go to the Staff URL
/cgi-bin/koha/svc/report?id=YOUR_REPORT_ID&sql_params=SOME_VALID_BIBLIONUMBER
5) Note you recieve a json response

NOTE: without applying the patch you get an empty JSON response.

ALSO: running koha qa tools does not verify the changes.
      $ perlcritic -4 svc/report
      (my perlcritic rc points to the koha qa tool one)
      No issues.

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>