hg: jdk/jdk: 8241975: Run jdk/jfr/event/metadata/TestLookForUntestedEvents.java in tier3

[mikhailo.seledtsov at oracle.com]

Changeset: 7a0e49b04eff
Author:    mseledtsov
Date:      2020-04-17 09:53 -0700
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/7a0e49b04eff

8241975: Run jdk/jfr/event/metadata/TestLookForUntestedEvents.java in tier3
Summary: Added the test to jdk_tier3 via jdk_jfr_tier3
Reviewed-by: egahlin

! test/jdk/TEST.groups