to metabase
* EncryptedMetainfoEncryptedKey added to CommitSegment and
UpdateMetadata request
* EncryptedMetainfoEncryptedKey returned with GetObject response and all
delete responses
* EncryptedMetainfoEncryptedKey returned with object iterator results
Change-Id: I917541ab5f3e1863bc8f238d17a15fbf72a23025
This change is adjusting metainfo endpoint to use metabase for uploading
and downloading remote objects. Inline segments will be added later.
Change-Id: I109d45bf644cd48096c47361043ebd8dfeaea0f3