Try to provide a real hostname for the remote host to aid in debugging

Refs trac:4908

This commit was SVN r32748.

The following Trac tickets were found above:
  Ticket 4908 --> https://svn.open-mpi.org/trac/ompi/ticket/4908

orte/mca/oob/tcp/oob_tcp_connection.c

@@ -255,6 +255,9 @@ void mca_oob_tcp_peer_try_connect(int fd, short args, void *cbdata)
         /* no address succeeded, so we cannot reach this peer */
         peer->state = MCA_OOB_TCP_FAILED;
         host = orte_get_proc_hostname(&(peer->name));
+        if (NULL == host) {
+            host = opal_net_get_hostname((struct sockaddr*)&(peer->active_addr->addr));
+        }
         /* use an opal_output here instead of show_help as we may well
          * not be connected to the HNP at this point */
         opal_output(orte_clean_output,