In the past we set incorrect primary key for bucket_bandwidth_rollups
table and bucket name was first column of key instead of project id.
This change fixes this problem.
We will alter primary key manually for production satellites. That's
why migration code is checking if change was already applied.
https://github.com/storj/storj/issues/5332
Change-Id: I7dd555eb0c2f6fda1c90eaed08fa847b7f273bc7
