RFR 8202615: Remove NativeMonitorSpinLimit, NativeMonitorFlags and NativeMonitorTimeout experimental flags

[Kim Barrett]

> On Jun 22, 2018, at 6:23 PM, patricio.chilano.mateo at oracle.com wrote:
> 
> Hi all,
> 
> I’m Patricio, and just joined the JVM team at Oracle last week. This is my first RFR which involves removing the experimental flags mentioned below. Could you please review this fix?
> 
> Summary: Removed NativeMonitorSpinLimit, NativeMonitorFlags and NativeMonitorTimeout experimental flags from globals.hpp and mutex.cpp and marked them as obsolete.
> Note: Flags were removed so that code behaves as it was with experimental flags having their default values.
> 
> Bug URL: <https://bugs.openjdk.java.net/browse/JDK-8202615>https://bugs.openjdk.java.net/browse/JDK-8202615
> Webrev URL: http://cr.openjdk.java.net/~coleenp/8202615.01/webrev/
> 
> The fix was tested with Mach5 on tiers 1, 2, 3, 4 and 5 on all platforms.
> 
> Since this is my first RFR it might need more examination :)
> 
> Thanks,
> Patricio

Looks good.

Thanks for also removing the dead Steps.