RFR(S) : 8177710 : Convert TestMetaspaceUtils_test to GTest

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev//8177710/webrev.00/index.html
> 85 lines changed: 84 ins; 1 del; 0 mod; 


Hi all,

could you please review this small and trivial patch which converts TestMetaspaceUtils_test[1] to Gtest?
old tests hasn't been removed as it's still used by WhiteBox::runMemoryUnitTests, it will be handled separately.

webrev: http://cr.openjdk.java.net/~iignatyev//8177710/webrev.00/index.html
JBS: https://bugs.openjdk.java.net/browse/JDK-8177710
[1] http://hg.openjdk.java.net/jdk/jdk/file/tip/src/hotspot/share/memory/metaspace.cpp#l1569

Thanks,
-- Igor