Make ActiveMQ build and test pass in Newfoundland

Certain tests such as org.apache.activemq.broker.scheduler.CronParserTest, require a build/test to be run on an epoch that is aligned with the hour. In timezones such as Newfounland, which is shifted by 30 minutes, these tests fail.

Lets update the build/test suite to work in any time zone.

(Verified by changing timezone from NST to EST – on EST the test suite passes)