eliminate references to java.util.Date, java.util.Calendar, java.util.GregorianCalendar

[bpangburn]

Modify code using java.util.Date, java.util.Calendar, java.util.GregorianCalendar to use the newer java.time API.

[bpangburn]

https://docs.oracle.com/javase/8/docs/api/java/time/package-summary.html

[bpangburn]

The comment in this thread under "tl;dr" is pretty helpful:
https://stackoverflow.com/questions/8530545/java-sql-date-time

Discovered that H2 is a JDBC 4.1 driver, not 4.2 so using

LocalDateTime ldt = myResultSet.getObject( … , LocalDateTime.class ) ;

is not an option and throws a 'java.sql.SQLFeatureNotSupportedException: Not supported yet.' exception.

Can check driver numbers with:

connection.getMetaData().getJDBCMajorVersion()
connection.getMetaData().getJDBCMinorVersion()

Will likely have to support String conversions for now or convert from/to epoch/milliseconds.