Revert "Renamed input households_efficiency_low_temperature_washing in bulk_update script."
Revert "Renamed input households_efficiency_low_temperature_washing in bulk_update script."

This reverts commit 2c755d5ea025ae084c68f43a25a2429a73356f88.

quintel/etengine,quintel/etengine,quintel/etengine,quintel/etengine