FeignMetricTagResolver lost Exception tag

[pangengteng]

when call the method "feign.micrometer.FeignMetricTagResolver#tag(feign.MethodMetadata, feign.Target<?>, java.lang.Throwable, io.micrometer.core.instrument.Tag...)" as below, the "e" was lost as not pass to the inner method

public Tags tag(MethodMetadata methodMetadata, Target<?> target, Throwable e, Tag... tags) {
return tag(methodMetadata.targetType(), methodMetadata.method(), target.url(), tags);
}

[eshishkin]

Hi, I met the same issue in our project a couple of days ago. I created a PR (#1720), so it should solve the problem