Endpoint.doConnect does not handle unresponsive connections

If a connection created by EndpointImpl does not get an AUTH_COMPLETE, nor a failure or close response by the server, EndpointImpl.resourceCount will be inconsistent, as it will account for a connection that will never be added to connections map.
As a result, if such EndpointImpl is requested to close, it will never be able to complete the close operation, given the count will never become equal to CLOSED_FLAG. (i.e., 0 | CLOSED_FLAG, meaning there are no resources open and the endpoint can finally be closed).