PDI-11545 Add mapping of TYPE_TIMESTAMP to JDBC TIMESTAMP

The Vertica Database Meta class mapped TYPE_DATE to JDBC TIMESTAMP, but it didn't map TYPE_TIMESTAMP.  Don't know if that is because TYPE_TIMESTAMP is newer or what, but regardless, this one-liner will slightly improve the support for Vertica 6 and Vertica 7 when trying to use the SQL button on Table Output or the Vertica Bulk Loader.