upgrade prometheus client-go

Signed-off-by: zackzhangkai <zackzhang@yunify.com>

vendor/github.com/go-openapi/runtime/logger/logger.go

@@ -0,0 +1,12 @@
+package logger
+
+import "os"
+
+type Logger interface {
+	Printf(format string, args ...interface{})
+	Debugf(format string, args ...interface{})
+}
+
+func DebugEnabled() bool {
+	return os.Getenv("SWAGGER_DEBUG") != "" || os.Getenv("DEBUG") != ""
+}