Log IP V6 address read from NRT and pass it from slurmctld.

Remove vestigial plugins rather than updating them for changes in
switch plugin logic necessitated for IBM NRT interface.

Prior code assumed even task distribution (as required by switch/elan).

The local pnsd daemons cache recently used job keys and there re-use after a short period of time generates errors

If job network field contains lapi or pami, set switch network protocol
appropriately

Parse job's network option to set NRT switch user_space and ipv4
flags appropriately.

Transfter an NRT network_id on job registration from slurmd to slurmctld
and have slurmctld pick and xmit back to slurmd the network_id to be
loaded for a starting job

Add job name to call. Add logging for call.

by default on a 64bit system.  This was used with AIX back in the day and
is no longer relavant.