Recovering recreate_db_checkpoint.sh and undoing other changes done in
change @24393 as a quick patch/fix for SDP-341.
Also uncommenting the test for this script as the script is being
re-added.
Bypassing pre-commit review for this, as I need to commit this before
making the next set of more review-worthy changes, including renaming
this script per discussion in review: https://swarm.workshop.perforce.com/reviews/24394/#comments