RFR (XXS): 8140350: compiler control tests fail with compiled: true, but should: false on required level: 1

[Pavel Punegov]

Hi,

Please review the following fix for compiler control tests.
Issue: Tests could fail (mostly with Xcomp) if they check compilation 
with WB.isMethodCompiled(), because method could be already compiled on 
higher level.
When test method is excluded on the 1st level, it will be compiled on 
the 4th level. Test would incorrectly assume then that test method is 
compilable on the level it should not.

Fix: make test check that the method could be compiled on particular 
level with WhiteBox.isMethodCompilable.

bug: https://bugs.openjdk.java.net/browse/JDK-8140350
webrev: http://cr.openjdk.java.net/~ppunegov/8140350/webrev.00/

-- 
Thanks,
Pavel Punegov