Bug 14737: wrong permissions required for cn_browser.pl plugin

The cn_browser.pl cataloguing plugin only searches for used callnumbers
on the bibliographic database. There is no need for this plugin to
require special permissions besides access to the catalog.

To test:
- Link the cb_browser.pl cataloguing plugin to 952$o in your favourite cataloguing framework
- Login with a superlibrarian user
- Try the plugin
=> SUCCESS: you can use it
- Login with a user that has the full 'tools' permission
- Try the plugin
=> SUCCSES: you can use it
- Login with a user that doesn't have full 'tools' permission
  but has the normal catalogue and cataloguing permissions.
- Try the plugin
=> FAIL: you are requested to login with a different user
- Apply the patch
- Retry
=> SUCCESS: you can use it
- Sign off :-D

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit b348c07f96)
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>

cataloguing/value_builder/cn_browser.pl

@@ -37,7 +37,7 @@ sub plugin {
             query           => $cgi,
             type            => "intranet",
             authnotrequired => 0,
-            flagsrequired   => { tools => 'cn_browser', catalogue => 1 },
+            flagsrequired   => { catalogue => 1 },
         }
     );