Bug 16436 - Allow action logs to be logged to the koha log file

Bug 16436 - Allow action logs to be logged to the koha log file

Test Plan:
1) Ensure that your Koha::Logger configuration is in good working order
2) Apply this patch
3) Modify the first line of your log4perl.conf file from:
    log4perl.logger.intranet = WARN, INTRANET
   to
    log4perl.logger.intranet = INFO, INTRANET
4) Change a system preference setting
5) Note the new line in your log file!

Signed-off-by: Srdjan <srdjan@catalyst.net.nz>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit ce8c55fba055e856af406587894c6d67c68bc681)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>