call super.disconnect instead of connect (ensures event network.disconnected broadcast) (#22)

Author: akumlehn

Hologram/Network/Cellular.py

@@ -90,7 +90,7 @@ def disconnect(self):
             self.logger.info('Successfully disconnected from cell network')
             self._connection_status = CLOUD_DISCONNECTED
             self.event.broadcast('cellular.disconnected')
-            super().connect()
+            super().disconnect()
         else:
             self.logger.info('Failed to disconnect from cell network')