The total_plain_size and total_encrypted_size columns in the objects
table were set as INT4, which limits the size of committed objects to
just 2 GiB.
This patch migrates the DB to change the type of these fields to INT8.
Change-Id: Iad7e7b44a652e6c5b8e17b80588637bb48390fe6
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
