Type:bug report

When use degraderule,add exception rate equals 1.0,it's invalid。
And when I view the source code,it's:

**double curCount = errCount;

if (strategy == DEGRADE_GRADE_EXCEPTION_RATIO) {
// Use errorRatio
curCount = errCount * 1.0d / totalCount;
}
if (curCount > threshold) {
transformToOpen(curCount);
}
}**
so it will not greater than 1，and the value [0.0-1.0] make any means？

2、use jdk1.8,sentinel 1.8.0,windows10