Single-visit processing astrodrizzle parameter clean-up

[stsci-hack]

The settings for astrodrizzle used in the single-visit processing as set in the .json configuration parameter files needs to be revised; specifically,

• preserve : Needs to be set to false in order to prevent the "OrIg_files" directory from being created and left behind after processing.

This was found to be set in at least the default_parameters/wfc3/uvis/wfc3_uvis_astrodrizzle_any_n2.json file. It should never be turned on for any of the single-visit processing, so all files need to be checked for this parameter setting.