Update metric.py

Author: mateuszskoczek

src/metric.py

@@ -1,5 +1,5 @@
 from abc import abstractmethod
-from prometheus_client import *
+from prometheus_client import Gauge
 from re import Pattern
 import re
 import os
@@ -71,4 +71,4 @@ def update(self):
             out_value = result.groupdict()["OUT_VALUE"]
 
             self.gauge.labels(lease, connection, "in").set(int(in_value))
-            self.gauge.labels(lease, connection, "out").set(int(out_value))
+            self.gauge.labels(lease, connection, "out").set(int(out_value))