The DBs of our production satellites have some indexes that we didn't
have in the migrations because at that time we weren't able to add them
because our migration test was not able to deal with Cockroach indexes
with the STORING clause.
We have recently modified the storj.io/private/dbutil/pgutil package to
support the CRDB STRORING clause, so we are adding the missing indexes
to our migrations for being able to have them if we have to recover a DB
from scratch or we deploy a new DB satellite.
Change-Id: I686ff84e5b4c02d9615f50fa531261363affefb8
