If ompi_modex_recv() fails with OPAL_ERR_DATA_VALUE_NOT_FOUND, it
simply means that the peer process did not put any usnic BTL modex
info -- it is not an error. So have the usnic BTL simply ignore that
peer (vs. disqualifying itself / treating this like a real error).
Refs trac:4442.
This commit was SVN r31258.
The following Trac tickets were found above:
Ticket 4442 --> https://svn.open-mpi.org/trac/ompi/ticket/4442