TestOverloadCompileQueues sometimes doesn't test anything

[Andrew Haley]

This test sets -XX:-TieredCompilation -XX:CompileThreshold=2
-XX:CICompilerCount=1 then repeatedly loads classes and invokes their
methods. However, in testing as often as not this test exits *before*
any of the test classes have been compiled, so the test is completely
ineffective. If I set CICompilerCount=8 I can get some unloading.

This is with a debug build: I need that for assertions.

-- 
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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