RFR: 8242891: vmTestbase/nsk/jvmti/ test should be fixed to fail early if JVMTI function return error

[Leonid Mesnik]

Hi

Could you please review following fix which stop test execution if JVMTI 
function returns error. The test fails anyway however using potentially 
bad data in JVMTI function might cause misleading crash failures. The 
hs_err will contains the stacktrace not with problem function but with 
function called with corrupted data. Most of tests already has such 
behavior but not all. Also I fixed a couple of tests to finish if they 
haven't managed to suspend thread.

I've updated only tests which try to use corrupted data in JVMTI 
functions after errors. I haven't updated tests which just compare/print 
values from erroring JVMTI functions. The crash in strcmp/println is not 
so misleading and might be point to real issue.

webrev: http://cr.openjdk.java.net/~lmesnik/8242891/webrev.00/

bug: https://bugs.openjdk.java.net/browse/JDK-8242891

Leonid