[LOOM] vmTestbase/nsk/jdi/ClassType/invokeMethod/invokemethod011 sometimes fails

On very rare occasion I'm seeing this test fail when using the vthread wrapper. It's popped up a couple of times in my recent runs, but I've been doing a large number runs. I looked in the history and see it also popped up once in CI testing on Jan 27th. The test previously failed a lot for this same reason back in 2021-09-01, but that was back when I was doing a lot of runs while fixing a similar issue.

Similar failures now spotted with the following tests:

vmTestbase/nsk/jdi/ObjectReference/invokeMethod/invokemethod010
vmTestbase/nsk/jdi/ClassType/invokeMethod/invokemethod011
vmTestbase/nsk/jdi/ClassType/invokeMethod/invokemethod013