hg: jdk/sandbox: Extract EventProducer and update TestRecursive

[erik.gahlin at oracle.com]

Changeset: 5469bde803fe
Author:    egahlin
Date:      2019-10-11 20:17 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/5469bde803fe

Extract EventProducer and update TestRecursive

+ test/jdk/jdk/jfr/api/consumer/recordingstream/EventProducer.java
! test/jdk/jdk/jfr/api/consumer/recordingstream/TestRecursive.java
! test/jdk/jdk/jfr/api/consumer/recordingstream/TestStart.java