The java/util/concurrent/ConcurrentHashMap/MapLoops test fails in a debug build.

The test invocation includes `-XX:LockingMode=0 -XX:+VerifyHeavyMonitors`

The VM error message is:

"-XX:+VerifyHeavyMonitors requires LockingMode == 0 (LM_MONITOR)"

The LockingMode is 1, causing the failure.

When preview is enabled, the LockMode is overridden and the argument ignored.