LU-9990 lnet: add backwards compatibility for YAML config

LU-9990 lnet: add backwards compatibility for YAML config

In 2.10 YAML configuration had a numa block, which was
removed post 2.10. The YAML parser needs to continue handling
the numa block to maintain backwards compatibility.

Signed-off-by: Amir Shehata <amir.shehata@intel.com>
Change-Id: Ic6ff6033631c5bec82323d9f8d5d4f2a19fd8d1b
Reviewed-on: https://review.whamcloud.com/29333
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Sonia Sharma <sonia.sharma@intel.com>
Reviewed-by: Doug Oucharek <dougso@me.com>
Reviewed-by: Olaf Weber <olaf.weber@hpe.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>