bin/map: by_col: Reuse existing out_db connection for in_db instead of opening separate connection

sql.py: mk_select(): Replaced newlines with spaces when query is simple enough to fit on one line

db_xml.py: put_table(): Set db.src to help identify the data source in pg_stat_activity

sql.py: DbConn: Added src config param, which in autocommit mode, will be included in a comment in every query, to help identify the data source in pg_stat_activity

sql_gen.py: Added lstrip() to remove comments

sql.py: mk_insert_select(): Added src param to help identify the data source in pg_stat_activity

mappings/DwC2-VegBIEN.specimens.csv: Mapped institutionCode. This will enable datasources to use specimenreplicate's institution_id index for duplicate elimination.

input.Makefile: Prompt user to accept test, instead of providing command line func for doing so

schemas/vegbien.sql: specimenreplicate: UNIQUE INDEX on catalognumber_dwc: Added institution_id so that datasources that specify it (such as aggregators) will not need to have catalognumbers be globally unique. Once the institution_id is mapped to, this will fix a bug where rows with the same catalognumber were assumed to be duplicates even though they were from different institutions. This should also avoid the need to do any duplicate elimination joins when importing specimenreplicate, speeding up column-based import.

schemas/vegbien.sql: specimenreplicate: Renamed museum_id to institution_id to correspond with DwC's institutionCode, so that it would be more obvious where to map institutionCode fields to