8152180: SIGFPE in CMSCollector::preclean with big CMSScheduleRemarkSamplingRatio
Summary: Rephrased the calculation routine to avoid an overflow for CMSScheduleRemarkSamplingRatio
Reviewed-by: jwilhelm, drwhite
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<excludeList>
<test id="JDK-8014647.js" />
<test id="javaclassoverrides.js" />
<test id="JDK-8020809.js" />
</excludeList>