Define more than one Requester on the same Responder in one instance

The Cameo API is limited to the definition of a single Requester for a given Responder. We can modify the API to enable to have multiple requesters: RequesterImpl.getRequesterPortName() must have another implementation:

return REQUESTER_PREFIX + name + "." + responderId + "." + requesterCounter;

With requesterCounter a static integer incremented by concurrent access.

To be implemented in Java and C++.