Update Testing NUMA documentation
Update Testing NUMA documentation

The document which contains the steps to test different NUMA
setups was using legacy instructions. This change pretends to update
those instructions to improve the readability.

Change-Id: Id8bf96f035528b15a51c802f06e07422b9f36736

rahulunair/nova,mahak/nova,klmitch/nova,openstack/nova,mahak/nova,openstack/nova,klmitch/nova,mahak/nova,rahulunair/nova,openstack/nova,rahulunair/nova,klmitch/nova,klmitch/nova