RFR: 8265348: Shenandoah: Use timed wait to sleep control thread

[Zhengyu Gu]

On Fri, 16 Apr 2021 14:55:51 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Wait, there are questions about lock ranking. I wanted to address it in https://bugs.openjdk.java.net/browse/JDK-8264851.

I did not realize JDK-8264851. I am closing this as duplicate.

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PR: https://git.openjdk.java.net/jdk/pull/3547