vm: Collect vm numa node runtime pin information

Get the information that vm numa node runtime pin on which host numa
nodes.

Change-Id: I20eac3b633efa5f81157f021515425b0c9e15d8f
Bug-Url: https://bugzilla.redhat.com/1100202
Signed-off-by: Bruce Shi <xiao-lei.shi@hp.com>
Reviewed-on: http://gerrit.ovirt.org/28134
Reviewed-by: Francesco Romani <fromani@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>