bin/map: out_is_db: Output the put template to stdout so it will be validated in the automated testing

xml_func.py: process(): If local XML function can't be found, just replace with last param instead of returning an error. This allows DB-only functions to be ignored in XML output mode.

sql_gen.py: ColDict.__setitem__(): Fixed bug where None value should not be replaced with column default value if column has no underlying table

sql.py: DbConn.col_info(): If column does not exist, raise sql_gen.NoUnderlyingTableException

sql_io.py: put_table(): In log messages, use `.to_str(db)` instead of repr() where possible to use the SQL syntax of the DB driver

sql_io.py: put_table(): ignore(): Replacing invalid value with NULL in nullable column: Corrected log message to "Replacing invalid value ... with NULL in column ..." because the rows with that value are not ignored in that case

sql.py: run_query(): InvalidValueException: Parse any exception ending in "out of range", not just "field value out of range", in order to support errors that the timezone is out of range

schemas/py_functions.sql: _dateRange*(): Made functions STRICT because they return NULL on NULL input

sql_io.py: put(): Use a simple case of put_table(), which now supports everything put() needs. This will enable all row-based and column-based processing to be maintained in the same function, put_table(), and avoids the need to reimplement any column-based functionality (like SQL functions) in put().

xml_dom.py: NodeTextEntryIter: Allow empty values through as None, and instead filter them out in TextEntryOnlyIter using new helper function non_empty(). This allows XML functions to decide for themselves whether empty values should be filtered out, because process() will now no longer automatically remove them. This will enable process() to work with SQL functions, which must not have empty values filtered out because this will remove required, but nullable, arguments.