gerrit.sh: actually verify running processes

When doing a gerrit.sh check, currently we only look for the pid file.
If the service has crashed or something else has shut it down, we won't
see it and since Gerrit usually is pretty critical we should make sure
that we verify that we have a process running.

gerrit-pgm/src/main/resources/com/google/gerrit/pgm/gerrit.sh

@@ -522,8 +522,10 @@ case "$ACTION" in
     echo
 
     if test -f "$GERRIT_PID" ; then
-        echo "Gerrit running pid="`cat "$GERRIT_PID"`
-        exit 0
+        if running "$GERRIT_PID" ; then
+            echo "Gerrit running pid="`cat "$GERRIT_PID"`
+            exit 0
+        fi
     fi
     exit 1
   ;;