private void shutdownConsoleCommunication(ConsoleCommunication consoleCommunication) {
		if (consoleCommunication != null) {
			consoleCommunication.shutdown();
		}
		m_consoleListener.discardMessages(ConsoleListener.ANY);
	}
Filter classpath to prevent too many instrumentation.

@param properties system properties
@param handler    Language specific handler
@param logger     logger
@return new filtered properties
ngrinder-core/src/main/java/net/grinder/engine/agent/AgentImplementationEx.java