Fixed SerializationCompatTest.

Needed to override KryoTestCase.assertEquals because the standard
junit assert equals does not handle object graphs accordingly.
commons EqualsBuilder.reflectionEquals is also not sufficient, therefore
I added a reflectionEquals I used in kryo-serializers and memcached-
session-manager and in other projects (so it's fairly good tested).

Specialities:
- _doubleArray leads to deserialization failures
- InvocationHandler / proxy causes issues
- _PersonArray (object graph) causes issues, not sure why
- Inner class is not deserialized correctly
- _genericArray is not deserialized correctly