DLT - Connector component:

- updated proto definition to include the domain that originates the record
- updated proto definition to include RecordLink and RecordAllLinks methods
- updated proto definition to provide the domain for which RecordAll* methods should be executed
- updated DltConnectorClient accordingly
- implemented RecordDevice and RecordLink in DltConnectorServicer
- removed unused OwnDomainFinder
- first functional version of DltEventDispatcher (only processes Devices and Links, by now)