Revert "Enable sqlite WAL to try to solve database locked problems."
refs #2699
This reverts commit e2c118e32866605abb96bafd5dd7a5f0d1e53863.
Try switching to NullPool to solve database locked issues. refs #2360, #2686
Catch timeouts in form login plugin. fix #2700
Revert "Try switching to NullPool to solve database locked issues. refs #2360, #2686"

This reverts commit 756e05d4c1215a6e3785cbde2df8c64998732ae0.