hg: jdk10/sandbox/jdk: 8178508: Co-locate remaining MM tests

[chris.hegarty at oracle.com]

Changeset: 839cc492ef61
Author:    uvangapally
Date:      2017-06-22 11:53 +0530
URL:       http://hg.openjdk.java.net/jdk10/sandbox/jdk/rev/839cc492ef61

8178508: Co-locate remaining MM tests
Summary: converted Tonga test to JTREG and added an additional check for setUsageThreshold
Reviewed-by: mchung, hb, iignatyev
Contributed-by: ujwal.vangapally at oracle.com

+ test/java/lang/management/MemoryPoolMXBean/LargeHeapThresholdTest.java