Uplink needs only part of columns we are reading from DB.
To improve performance we should read only those that are
realy needed.
Change-Id: Ib39259318169c46afe5fa4c6ce2184da82e960c8
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
Testing interfaces is slightly clearer when it's in the package needing
the database rather than each individual implementation.
Change-Id: I10334c214a205f7e510b939b4359a2214c4e060a
