hookscripts: Changes in hook scripts to make it work on all Linux/GNU distribution
Removed the hard coded values for smb.conf, smb logfile location and smbd.pid.
The current hook scripts also work for manully compiled (make, make install)
instance of gluster and Samba. But we have to manually copy the hook scripts
to respective locations.

Change-Id: I14056830fcd2ecb48b3c4df89265f4408c8de3e3
Signed-off-by: Lalatendu Mohanty <lmohanty@redhat.com>
Reviewed-on: http://review.gluster.org/5947
Reviewed-by: poornima g <pgurusid@redhat.com>
Reviewed-by: susant palai <spalai@redhat.com>
Reviewed-by: Raghavendra Talur <rtalur@redhat.com>
Tested-by: Raghavendra Talur <rtalur@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>