[AMQ-5692] Inactivity monitor does not time out on stuck socket writes

From AMQ-5692:

It is possible that a socket write is stuck but the inactivity monitor currently does not time out on a socketWrite.

    final void writeCheck() {
        if (inSend.get()) {
            LOG.trace("Send in progress. Skipping write check.");
            return;
        }

As a result a connection that is stuck in a tcp write will never be taken down due to inactivity. If a client misbehaves the broker will not be able to clear that connection as part of the inactivity monitoring.

Now AMQ-2511 introduced a counter on reachCheck() to detect it a socket read in progress really retrieves data or is stuck.
I propose for a similar mechanism being applied on the writeCheck() operation so that a socket write that is stuck can be detected and the connection can be closed.