Communicator Split Type NUMA Behavior

[hppritcha]

See thread on user list:

https://www.mail-archive.com/users@lists.open-mpi.org/msg33589.html

related to #7201

[jsquyres]

v3.0.x/v3.1.x release manager decision: we will not be bringing this fix back to the v3.0.x or v3.1.x branches. The fix for this will only be on v4.0.x and forward.

[gpaulsen]

I believe #7356 is intended to resolve this Issue.