Mimicking the connection status

[lfse-slafleur]

Add functionality for forwarding a connection event to the other side of the proxy, such as disconnection.
Example:
1 CEM and RM connected to the S2 analyzer.
2. Connection between CEM and S2 analyzer disrupted.
3. Previous step will trigger disconnection of related RMs from S2 analyzer, from S2 analyzer's side.