Add ExceptionHandler to the Netty Channel Pipeline

- Handle cases where an connection is quickly openend and closed
- Fix bug 1175

Change-Id: Ib0dc2f5c39e5418263222af7b50f82fa1bf31c88
Signed-off-by: Dave Tucker <djt@redhat.com>
Merge "Add ExceptionHandler to the Netty Channel Pipeline" into topic/schema