core: move vm numa fields to VmBase

Move vm numa related fields to VmBase entity since the fields will also
be called in VmTemplate.

Change-Id: Icc69f8167b8468becef728617ec850dc9034d88f
Bug-Url: https://bugzilla.redhat.com/1069303
Signed-off-by: Bruce Shi <xiao-lei.shi@hp.com>
Signed-off-by: Gilad Chaplik <gchaplik@redhat.com>