Add a test case with multiple rollbacks, which also tests a deployment that is a rollback and is rolled back
```
1:00 AM, X1
2:00 AM, X2 (rolled back)
3:00 AM, X1 (rolled back, rollback to 1:00 AM)
4:00 AM, X4 (rolled back)
5:00 AM, X1 (rollback to 1:00 AM)
```