RFR(M) 8219403: JVMCIRuntime::adjust_comp_level should be replaced

[Tom Rodriguez]

Looks good.

tom

dean.long at oracle.com wrote on 4/25/19 11:53 AM:
> https://bugs.openjdk.java.net/browse/JDK-8219403
> http://cr.openjdk.java.net/~dlong/8219403/webrev.2/
> 
> This change removes the problematic JVMCIRuntime::adjust_comp_level.  It
> is based on previous work in Graal, graal-jvmci-8, and Metropolis by Tom,
> Doug, and Vladimir.
> 
> I also problem-listed several tests that were causing noise in the test 
> results.
> 
> dl