Issue:
Removing/Unregistering of the worker is causing IOException.
Issue was spotted only on solaris.
Reproducer:

1. Set up EAP7 as balancer with Eap7 as worker.
2. Shutdown the worker and look for exception in balancer log

   2016-10-14 04:32:09,567 ERROR [stderr] (default I/O-30) Exception in thread "default I/O-30" java.lang.InternalError: java.io.IOException: File descriptor in bad state
   2016-10-14 04:32:09,569 ERROR [stderr] (default I/O-30) 	at sun.nio.ch.EventPortWrapper.release(EventPortWrapper.java:235)
   2016-10-14 04:32:09,569 ERROR [stderr] (default I/O-30) 	at sun.nio.ch.EventPortSelectorImpl.implDereg(EventPortSelectorImpl.java:144)
   2016-10-14 04:32:09,570 ERROR [stderr] (default I/O-30) 	at sun.nio.ch.SelectorImpl.processDeregisterQueue(SelectorImpl.java:149)
   2016-10-14 04:32:09,571 ERROR [stderr] (default I/O-30) 	at sun.nio.ch.EventPortSelectorImpl.doSelect(EventPortSelectorImpl.java:75)
   2016-10-14 04:32:09,572 ERROR [stderr] (default I/O-30) 	at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
   2016-10-14 04:32:09,573 ERROR [stderr] (default I/O-30) 	at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
   2016-10-14 04:32:09,573 ERROR [stderr] (default I/O-30) 	at org.xnio.nio.WorkerThread.run(WorkerThread.java:528)
   2016-10-14 04:32:09,575 ERROR [stderr] (default I/O-30) Caused by: java.io.IOException: File descriptor in bad state
   2016-10-14 04:32:09,576 ERROR [stderr] (default I/O-30) 	at sun.nio.ch.SolarisEventPort.port_dissociate(Native Method)
   2016-10-14 04:32:09,577 ERROR [stderr] (default I/O-30) 	at sun.nio.ch.EventPortWrapper.release(EventPortWrapper.java:233)
   2016-10-14 04:32:09,578 ERROR [stderr] (default I/O-30) 	... 6 more
   

3. If exception is not present try it few times, tests show that exception is it there almost every time