a7496ed83d
Motivation: 2b6525856868ab1788db957ff8af8eb22b42c774 only partially addressed the synchronization issues that are present in FlowControlHandlerTest. A few tests are attempting to validate state changes made across an EventLoop thread and the JUnit thread but are not properly synchronized. Modifications: - Ensure that conditions which verify expectations set in another thread have synchronization gates to ensure the event has actually occurred. - Remove the message counter verification in favor of using individual CountDownLatch objects Result: FLowControlHanderTest has less race conditions which may lead to test failures.