Do some code cleanup in the connect/accept code. Ensure that the OMPI
layer has access to the PMIx identifier for the process. Add macros for
converting PMIx names to/from strings. Cleanup a few of the simple test
programs. Add a little more info to a btl/tcp error message.
Signed-off-by: Ralph Castain <rhc@pmix.org>
a210f8046f