Journal replay failure after rm -R and re-create on a mount point

To trigger this issue, start an Alluxio cluster and run

Then restart Alluxio. The master fails to come up, with the error

This is because when we replay rm -R, we don't remove mount points. So on replay, we see an existing mount point being re-created.

To fix this, we should update the replay path for rm -R so that it removes mount points.