lib/runscripts/table.run: added $postprocess_sql to store postprocess.sql path, and use it in postprocess()

bugfix: lib/sh/local.sh: prevent automated tests when the public schema contains the live DB, so the user doesn't have to explicitly specify can_test= when running the import on vegbiendev

bugfix: lib/runscripts/table.run: import(): allow automated tests (remake_VegBIEN_mappings) to be disabled by setting can_test= if the public schema shouldn't be modified (e.g. if it's the live DB)

bugfix: inputs/*/*/postprocess.sql: made all operations idempotent, so that postprocess.sql can be run repeatedly (e.g. by new-style import)

schemas/util.sql: create_if_not_exists(): also suppress "multiple primary keys are not allowed" error

added inputs/newWorld/iso_code_gadm/.map.csv.last_cleanup

inputs/*/Source/VegBIEN.csv: regenerated for new-style import, which uses a symlink to mappings/VegCore-VegBIEN.csv instead of a custom mapping using the original column names

inputs/input.Makefile: Staging tables installation: %/install: run %/map_table at end to rename the staging table columns for new-style datasources

inputs/input.Makefile: Staging tables installation: added %/map_table to run the new-style import staging table renaming

inputs/bien2_traits/TraitObservation/map.csv: removed no longer needed mappings of dummy columns to OMIT, which were creating an unnecessary collision of staging table column names