Revert "Increase rate limits a bit more to allow for scripted migrations."

This change was needed to permit scripted migration... now we should
go back to our old, sane limits.

This reverts commit 125e29344c5b929637e0cec49074977e6bf9ec99.

Change-Id: I99115d242608a3f2a21038fe300ada0e5107a55a