CC-3575: Use invoke-rc.d to start and stop services, rather than calling init scripts directly

-done

python_apps/media-monitor/install/media-monitor-uninitialize.py

@@ -9,7 +9,7 @@ if os.geteuid() != 0:
 try:
     print "Waiting for media-monitor processes to stop...",
     if (os.path.exists('/etc/init.d/airtime-media-monitor')):
-        p = Popen("/etc/init.d/airtime-media-monitor stop", shell=True)
+        p = Popen("invoke-rc.d airtime-media-monitor stop", shell=True)
         sts = os.waitpid(p.pid, 0)[1]
         print "OK"
     else: