Adding isThrowableCausedByOrAssignableFrom method to the utils Debug class.
renaming TestException Classes since introspection from JUnit thinks they are actual tests.
useing isNetworkConnectionException method in ReverseProxyLoadBalancerServiceImpl to fix Bug674
Moving the isNetworkConnectionException to the IpHelper class since it was duplicated for some reason.
Merge branch 'bugFix674' into 1.18-candidate