Merge branch 'ueinfo_with_downcall_locking' into 'ibm-trunk'
Ueinfo with downcall locking
Clean up locking in Downcall to use java.util.concurrent.locks.
Unknown exception info service context was being unmarshalled on the wrong thread and did not have the correct class loading context.
TypeDescriptor caching was incorrect and allowed finding the wrong class in some circumstances.
FullValueDescription from ValueDescriptor incorrectly reported non-custom chunked types as custom, leading to errors when the client ORB tried to unmarshal the associated data.
See merge request !53
