scm: private data is not handled properly via CR rejects.

scm: private data is not handled properly via CR rejects.

For both RC and UD connect requests, the private
data is not being received on socket and passed
back via the active side REJECT event.

UD requires new extended reject event type of
DAT_IB_UD_CONNECTION_REJECT_EVENT to distiquish
between RC and UD type rejects.

cr_thread exit/cleanup processing fixed to insure
all items are off the list before exiting.

Signed-off-by: Arlin Davis <arlin.r.davis@intel.com>