RFR: 8145083: Use semaphore instead of mutex for synchronization of Unified Logging configuration

[Kim Barrett]

On Dec 15, 2015, at 10:12 AM, Marcus Larsson <marcus.larsson at oracle.com> wrote:
> 
> I think it's worth another round. :)
> 
> New webrev:
> http://cr.openjdk.java.net/~mlarsson/8145083/webrev.04/
> 
> Incremental:
> http://cr.openjdk.java.net/~mlarsson/8145083/webrev.03-04/

Looks good.

I like the reorganization around the ConfigurationLock class.