[10] RFR(s) 8186136: [Graal] some tests setting -Djvmci.Compiler=null fail with: jdk.vm.ci.common.JVMCIError: no JVMCI compiler selected

[Vladimir Kozlov]

http://cr.openjdk.java.net/~kvn/8186136/webrev/
https://bugs.openjdk.java.net/browse/JDK-8186136

I think most of jvmci tests do not need '-Djvmci.Compiler=graal' for 
execution - using -Djvmci.Compiler=null is correct thing. We reduce 
testing time if we don't load Graal.

Only test which do compilation and need JIT compiler are fixed for the 
case when Graal is JIT compiler.
I also fixed JVM_GetJVMCIRuntimeTest.java for JDK-8186144 - added 
-XX:-UseJVMCICompiler for -XX:-EnableJVMCI case.

RBT tested and local test with both, default JIT and Graal JIT.

Thanks,
Vladimir