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

-fixed

python_apps/pypo/install/pypo-initialize.py

@@ -120,14 +120,14 @@ try:
     """
     if os.environ["liquidsoap_keep_alive"] == "f":
         print " * Restarting any previous Liquidsoap instances"
-        p = Popen("/etc/init.d/airtime-playout stop > /dev/null 2>&1", shell=True)
+        p = Popen("invoke-rc.d airtime-playout stop > /dev/null 2>&1", shell=True)
         sts = os.waitpid(p.pid, 0)[1]
     else:
         print " * Keeping any previous Liquidsoap instances running"
-        p = Popen("/etc/init.d/airtime-playout pypo-stop  > /dev/null 2>&1", shell=True)
+        p = Popen("invoke-rc.d airtime-playout pypo-stop  > /dev/null 2>&1", shell=True)
         sts = os.waitpid(p.pid, 0)[1]
     """
-    p = Popen("/etc/init.d/airtime-playout start-no-monit  > /dev/null 2>&1", shell=True)
+    p = Popen("invoke-rc.d airtime-playout start-no-monit  > /dev/null 2>&1", shell=True)
     sts = os.waitpid(p.pid, 0)[1]
     
 except Exception, e:

python_apps/pypo/install/pypo-uninitialize.py

@@ -10,7 +10,7 @@ try:
     #stop pypo and liquidsoap processes
     print "Waiting for pypo processes to stop...",
     if (os.path.exists('/etc/init.d/airtime-playout')):
-        p = Popen("/etc/init.d/airtime-playout stop", shell=True)
+        p = Popen("invoke-rc.d airtime-playout stop", shell=True)
         sts = os.waitpid(p.pid, 0)[1]
         print "OK"
     else:

python_apps/pypo/install/pypo-uninstall.py

@@ -30,7 +30,7 @@ try:
         print 'Error loading config file: ', e
         sys.exit(1)
         
-    os.system("/etc/init.d/airtime-playout stop")
+    os.system("invoke-rc.d airtime-playout stop")
     os.system("rm -f /etc/init.d/airtime-playout")
     os.system("update-rc.d -f airtime-playout remove >/dev/null 2>&1")