extras: /etc/init.d/glusterd should create a lockfile under /var/lock/sybsys

Without a lockfile under /var/lock/subsys, the glusterd service is not
stopped on shutdown or reboot.

Change-Id: Ib2c28821061ed0fd374731681a81f3fd8e989193
BUG: 960476
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/4961
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>