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

8056143: interrupted java/lang/management/MemoryMXBean/LowMemoryTest.java leaves running process
Reviewed-by: sla, dholmes

8043520: Serviceability tests using @library failing with java.lang.NoClassDefFoundError
Reviewed-by: sla, egahlin

8022229: Intermittent test failures in sun/tools/jstatd
Reviewed-by: sla, egahlin, jbachorik, allwin