Bug 15626: Remove log4perl.conf when using koha-remove

Bug 15626: Remove log4perl.conf when using koha-remove

if you create a koha install using koha-create, and remove it with
koha-remove, the /etc/koha/sites/$SITE/ directory won't be removed,
because the /etc/koha/sites/$SITE/log4perl.conf has not been removed by
this script.

Test plan:
Use this koha-remove script to remove a koha install
Without this patch, the /etc/koha/sites/$SITE directory won't be
removed.
With this patch applied, the directory will be correctly removed.

Signed-off-by: Hector Castro <hector.hecaxmmx@gmail.com>
Works as advertised

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>
(cherry picked from commit 8d3eb52edabaceb731b27f8e25a6324579c2c9e1)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>