* Validate ports as port
Better than just a positive integer since it limits the range from 1 to 65535.
* Validate port for Axis
* Validate port for Xiaomi Home Camera
* Validate port for Modbus
* Validate port for Yamaha MusicCast Receivers
* Update zhong_hong.py
Validate port as a port, the gateway address as positive_int
Also moved the default values to their variable
* Validate port for the Asterisk Voicemail interface
* Fix lint
* Validate port for Xiaomi Cameras