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

[Markus Gronlund]

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