Major Description
There have been reports that rebalance is often run multiple times in rapid succession to assure the desired result is achieved, but an immediate second rebalance shouldn't produce a different result on a region if rerun before additional region operations are performed. Since we don't have any artifacts on a reproduction of this issue, we were unable to reproduce it ourselves but this test contributes to the coverage of rebalance and may help us diagnose this issue in the future if it appears.