They are needed for segment-verify tool.
Also rename some of the conversion methods to make clear,
which of them have side-effects.
Change-Id: Ie9a0952548e9ed5068c7a30c2fd2134b07139bca
metabase has become a central concept and it's more suitable for it to
be directly nested under satellite rather than being part of metainfo.
metainfo is going to be the "endpoint" logic for handling requests.
Change-Id: I53770d6761ac1e9a1283b5aa68f471b21e784198