Moved EventBus testing to a regular test round.
Temporarily reverting.

Revert "A workaround attempt for GH-146. We put a custom version of SynchronizedEventHandler for obfuscation against Guava. Instead of method flag we use an explicit monitor which doesn't confuse J9."

This reverts commit 39ff5743c513b3db4c3abe37c5cc50e52c6754e6.