Bug 11491: (QA follow-up) updated license and use Modern::Perl

Bug 11491: (QA follow-up) updated license and use Modern::Perl

Replaced License text with latest one from
    http://wiki.koha-community.org/wiki/Coding_Guidelines#Licence
and tweaked copyright lines accordingly.

Also changed use strict and use warnings into use Modern::Perl
as per PERL2 from the coding guidelines.

TEST PLAN
---------
1) less ~/kohaclone/opac/svc/report
   - The license does not reflect the current license
   - This will have use strict and use warnings
2) Apply patch
   - The license should be corrected
3) It should still run
     https://.../cgi-bin/koha/svc/report?id=##
     https://.../cgi-bin/koha/svc/report?id=##&annotated=blah
   Where ## reflects a public report available (for OPAC).

Signed-off-by: Holger Meißner <h.meissner.82@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>