Do not write each SQL error multiple times in TestScript

Improve test stability

Fix TestDateTimeUtils.testDayOfWeek() and example with ANY(?)

Reimplement DATEDIFF without a Calendar

Add support for = ANY(?)

Allow to read invalid February 29 dates with LocalDate as March 1

Encode date and time in fast and proper way in PgServerThread

Reimplement remaining parts of EXTRACT, ISO_YEAR, etc without a Calendar

to see if we can figure out why it fails on travis