[#2267] Add AMQP 1.0 based DeviceRegistrationClient implementation
Added implementations of the adapter client's DeviceRegistrationClient interface which simply wraps the existing vertx-proton based "legacy" RegistrationClientImpl.
In order to be able to use the legacy CommandTargetMapper, its direct dependency on RegistrationClientFactory and BasicDeviceConnectionClientFactory has been replaced with a CommandTargetMapperContext interface which provides access to the required functionality. Existing code using the CommandTargetMapper with the legacy client will need to be adapted. For convenience, the CommandTargetMapper.createContext() method can be used to get an implementation based on RegistrationClientFactory and BasicDeviceConnectionClientFactory.