hg: code-tools/jmh: 7901990: Make sure only a single profiler of given type is used

[ashipile at redhat.com]

Changeset: a128fd4a5901
Author:    shade
Date:      2017-06-07 15:19 +0200
URL:       http://hg.openjdk.java.net/code-tools/jmh/rev/a128fd4a5901

7901990: Make sure only a single profiler of given type is used

+ jmh-core-it/src/test/java/org/openjdk/jmh/it/profilers/DuplicateProfilerTest.java
! jmh-core/src/main/java/org/openjdk/jmh/runner/Runner.java