init.d: Fix init.d on Redhat, so it does not always return 0.

* Installing gluster with puppet, it gives an error if service "hasstatus => true" is used.
* Introduced a $RETVAL variable set to previous command return value.

Change-Id: I186ec59f892f04f25c06478315ca85183cb6232a
BUG: 836007
Signed-off-by: Thomas Oulevey <thomas.oulevey@cern.ch>
Reviewed-on: http://review.gluster.org/3847
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

extras/init.d/glusterd-Redhat.in

@@ -57,20 +57,24 @@ stop()
 case $1 in
     start)
         start
+        RETVAL=$?
         ;;
     stop)
         stop
+        RETVAL=$?
         ;;
     status)
         status $BASE
+        RETVAL=$?
         ;;
     restart)
         $0 stop
         $0 start
+        RETVAL=$?
         ;;
     *)
         echo $"Usage: $0 {start|stop|status|restart}."
         exit 1
 esac
 
-exit 0
+exit $RETVAL