hg: jdk/sandbox: 8222888: [TESTBUG] docker/TestJFREvents.java fails due to "RuntimeException: JAVA_MAIN_CLASS_ is not defined"

[chris.hegarty at oracle.com]

Changeset: 7f30741331ad
Author:    mseledtsov
Date:      2019-04-25 11:45 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/7f30741331ad

8222888: [TESTBUG] docker/TestJFREvents.java fails due to "RuntimeException: JAVA_MAIN_CLASS_ is not defined"
Summary: Introduced unique environment variable
Reviewed-by: egahlin, lmesnik, sgehwolf

! test/hotspot/jtreg/containers/docker/TestJFREvents.java
! test/lib/jdk/test/lib/containers/docker/DockerTestUtils.java