LU-11163 libcfs: fix CPT NUMA memory failures

LU-11163 libcfs: fix CPT NUMA memory failures

In some (mis-)configurations, NUMA nodes may not have any local RAM,
or the memory allocations are non-uniform between NUMA nodes.

In the unlikely case that a CPT-bound allocation fails, retry the
allocation without the CPT-binding.  Having some remote memory usage
is better than an allocation failure.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: Ib0ab84bef8ff10c43bafb48a8082b62fc544ca29
Reviewed-on: https://review.whamcloud.com/32848
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Patrick Farrell <paf@cray.com>
Reviewed-by: John L. Hammond <jhammond@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>