8176176: fix @modules in jdk_svc tests
Reviewed-by: shurailine, sspitsyn

8078896: Add @modules as needed to the jdk_svc tests
Reviewed-by: alanb, mchung

8078334: Mark regression tests using randomness
Reviewed-by: xuelei, alanb

6809322: javax.management.timer.Timer does not fire all notifications
Summary: Some notifications get dropped due to ConcurrentModificationException thrown in Timer.notifyAlarmClock() method.
Reviewed-by: dholmes, rbackman
Contributed-by: jaroslav.bachorik@oracle.com