git: openjdk/loom: fibers: fix VThreadMonitorTest by commenting log statements as they can be blocked on monitors

[duke]

Changeset: 8683ac1a
Author:    Serguei Spitsyn <serguei.spitsyn at oracle.com>
Date:      2021-06-11 21:05:16 +0000
URL:       https://git.openjdk.java.net/loom/commit/8683ac1a65d6be9178552b20f91779e0e3b0f215

fix VThreadMonitorTest by commenting log statements as they can be blocked on monitors

! test/hotspot/jtreg/serviceability/jvmti/vthread/VThreadMonitorTest/VThreadMonitorTest.java