Getter methods part for service specific exception mapping needs to be rewritten

[Tomas-Kraus]

In JAX-WS spec 3.7 Service Specific Exception says
"For each getter in the exception and its superclasses, a property of the same
type and name is added
to the bean. The getCause, getLocalizedMessage and getStackTrace getters from
java-
.lang.Throwable and the getClass getter from java.lang.Object are excluded from
the list
of getters to be mapped."

The intent here is to pick up only Throwable#getMessage(). The above needs to rewritten
so that any future changes in Throwable do not affect mapping.

Source: javaee/metro-jax-ws#908
Author: glassfishrobot