Add two more beeps to the buzzer sound

Makes the buzzer notifications more noticeable.

modules/buzzer/__init__.py

@@ -9,7 +9,7 @@ except Exception as e:
 
 class Buzzer(object):
 
-    sound = ["H", 0.1, "L"]
+    sound = ["H", 0.1, "L", "H", 0.1, "L", "H", 0.1, "L"]
     def __init__(self, gpio):
         try:
             cbpi.app.logger.info("INIT BUZZER NOW GPIO%s" % gpio)