https://build.spring.io/browse/INT-SI43X-60
After introduction the `sendErrorToListener()` function for the `TcpConnectionSupport`, all the tests in the `TcpNioConnectionReadTests` have flaw to be affected by the race condition to release semaphore in the `onMessage()` and don't get a connection as closed yet.
* Fix the tests adding `CountDownLatch` for the `ErrorMessage` and `AtomicReference` to assert an Exception message afterwards.
**Cherry-pick to 4.3.x**
Add Travis diagnostic to determine what is the difference if that
Revert Travis diagnostic
Looks like would be better to wait for CI failure to determine the root of sporadic cause
a0845b1caf