RFR (XS) 8240069: Shenandoah: turn more flags diagnostic

[Roman Kennke]

Yes, that makes sense! Thank you!

Roman


> RFE:
>   https://bugs.openjdk.java.net/browse/JDK-8240069
> 
> Webrev:
>   http://cr.openjdk.java.net/~shade/8240069/webrev.01/
> 
> Regular sweep of flags that are experimental, but have been used as diagnostic. Diagnostic flags are
> usually for features that are enabled by default, and are not expected to be disabled, unless
> someone is chasing the bug.
> 
> Testing: hotspot_gc_shenandoah {fastdebug,release}
>