Simplify BeanstalkConnection.throwException method
Simplify BeanstalkConnection.throwException method

Remove redundant Exception tests:
- AsynchronousCloseException extends ClosedChannelException
- ClosedByInterruptException extends ClosedChannelException
- ClosedChannelException extends IOException
- SocketException extends IOException

zhaiii/beanstalkd_temp,dustismo/TrendrrBeanstalk