Moving vdsm-logrotate config under vdsm conf dir

The outcome of putting the conf under logrotate.d was daily run of
logrotate that specified in logrotate.conf which runs the logrotate.d
scripts. Moving it under vdsm conf dir will allow to use only cron job
for the rotation without system intervention.

Change-Id: Ic5b5376f682b159a3965ce00421ccd0ac0e0f9f7
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1126482
Signed-off-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/29624
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/31106