fpetkovski: Optionally report status classes in metrics

JobBuild
8548
05-21 18:14
pull-ingress-nginx-boilerplate 1528076661197639680
pull-ingress-nginx-codegen 1528076661222805504
pull-ingress-nginx-gofmt 1528076661256359936
pull-ingress-nginx-golint 1528076661289914368
pull-ingress-nginx-test 1528076661315080192