RFR(M): 8217089: JFR: Lazy install os interface components for improved startup

[Erik Gahlin]

Looks good.

Erik
> Greetings,
>
> Please review the following patch to improve startup when using JFR:
>
> Bug/Enh: https://bugs.openjdk.java.net/browse/JDK-8217089
> Webrev: http://cr.openjdk.java.net/~mgronlun/8217089/webrev01/
>
> Summary:
>
> Let the periodic event requestor thread lazy install os interface components instead of doing it eagerly as part of startup by the initial thread.
>
> Thank you
> Markus