restapi: NUMA feature restful API support

This the the draft version of restful API support
Let the owner review the interfaces and models

The restful API define is on ovirt wiki page
http://www.ovirt.org/Features/Detailed_NUMA_and_Virtual_NUMA

Change-Id: I72ed4b16c220decbf640f74c4aadffe423afc290
Bug-Url: https://bugzilla.redhat.com/1069303
Signed-off-by: Jason Liao <chuan.liao@hp.com>