[libvirt] [PATCH 0/4] Update interface xml to match netcf 0.1.5

[Laine Stump]

The first two patches make minor additions to the parsing/formatting.

The 3rd is a bit more intrusive, as it switches from using
virInterfaceBareDef for subordinate interfaces to recursively using a
full virInterfaceDef (but with guaranteed closure due to limiting the
type of subordinate interface allowed based on parent interface).

The final patch updates the RNG and test files accordingly.