[RFC] 8236174: Update javadoc since tags in the jfr backport

[Mario Torre]

Again from Marcus:

Jira:  https://bugs.openjdk.java.net/browse/JDK-8236174
Webrev: http://cr.openjdk.java.net/~hirt/JDK-8236174/webrev.0/

I tested the patch and is approved.

Cheers,
Mario
-- 
Mario Torre
Associate Manager, Software Engineering
Red Hat GmbH <https://www.redhat.com>
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