don't define /var/log/mediawiki in maintenance

do not define /var/log/mediawiki here, it is now
already defined in mediawiki/manifests/mwlogdir
and this causes a duplicate definition.

this means all appservers now have this dir, used or not
, but on terbium we want it with some subdirs for certain
crons

also the owner should now be apache since I70bc7bb631b6d9

Change-Id: Ifb2e756f5bd8301ba7bcab47f8defb6cc5354d52
Merge "don't define /var/log/mediawiki in maintenance" into production