Update fingergw init script for command socket

The zuul-fingergw in zuulv3 accepts the 'stop' command to stop
the daemon. This is the only valid way to stop it.

Change-Id: I86ac10c3a4d3af594fd32a5c0e316d626abf5a5e

files/zuul-fingergw.init

@@ -70,18 +70,8 @@ do_start()
 #
 do_stop()
 {
-    # Return
-    #   0 if daemon has been stopped
-    #   1 if daemon was already stopped
-    #   2 if daemon could not be stopped
-    #   other if a failure occurred
-    start-stop-daemon --stop --signal 9 --pidfile $PIDFILE
-    RETVAL="$?"
-    [ "$RETVAL" = 2 ] && return 2
-    if [ -f "$PIDFILE" ] ; then
-        rm -f $PIDFILE
-    fi
-    return "$RETVAL"
+    $DAEMON stop
+    return 0
 }
 
 #