Support for HAP included services

[ikalchev]

Consider the following Apple-defined service in json as an example:

"LockMechanism": {
      "IncludedServices": [
         "00000044-0000-1000-8000-0026BB765291"
      ],
      "OptionalCharacteristics": [
         "Name"
      ],
      "RequiredCharacteristics": [
         "LockCurrentState",
         "LockTargetState"
      ],
      "UUID": "00000045-0000-1000-8000-0026BB765291"
 }

The IncludedServices field is not yet supported in HAP-python.