Quick fix for syntax error

docker-compose/tango-prometheus-exporter/code/tango-prometheus-client.py

@@ -64,7 +64,7 @@ class ArchiverPolicy(object):
         return sorted(list(attributes))
 
 class CustomCollector(object):
-    def __init__(self, station, config, proxy_timeout=250):
+    def __init__(self, config, station, proxy_timeout=250):
         self.station = station
         self.policy = ArchiverPolicy(config)
         self.proxy_timeout = proxy_timeout