Fixes #4768: Move r32152 to v1.8 branch (opal_path_nfs.c test: skip fuse filesystems)

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r32152 [[BR]]
opal_path_nfs.c test: skip fuse filesystems

Linux statfs(2) lies about the type of fuse filesystems (it reports
fuse.encfs as an NFS filesystem).  So just skip fuse filesystems in
this test until/if we ever care to add some kind of workaround.

Refs #4767

cmr=v1.8.2:reviewer=rhc
Fixes #4765: Move r32142 to v1.8 branch (correct num_procs in corner case)

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r32142 [[BR]]
When a user asks for cpus/rank > 1 and only has one slot, we need to ensure we always map at least one process when they don't tell us -np

cmr=v1.8.2:reviewer=rhc:subject=correct num_procs in corner case