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-initialize.py

@@ -14,11 +14,8 @@ try:
 
         #Start media-monitor daemon
         print "* Waiting for media-monitor processes to start..."
-        """
-        p = Popen("/etc/init.d/airtime-media-monitor stop", shell=True)
-        sts = os.waitpid(p.pid, 0)[1]
-        """
-        p = Popen("/etc/init.d/airtime-media-monitor start-no-monit", shell=True)
+
+        p = Popen("invoke-rc.d airtime-media-monitor start-no-monit", shell=True)
         sts = os.waitpid(p.pid, 0)[1]
 except Exception, e:
     print e

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:

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

@@ -29,7 +29,7 @@ try:
         print 'Error loading config file: ', e
         sys.exit(1)
 
-    os.system("/etc/init.d/airtime-media-monitor stop")
+    os.system("invoke-rc.d airtime-media-monitor stop")
     os.system("rm -f /etc/init.d/airtime-media-monitor")
     os.system("update-rc.d -f airtime-media-monitor remove >/dev/null 2>&1")