S allius/issue196 (#198)

* fix healthcheck

- on infrastructure with IPv6 support localhost
  might be resolved to an IPv6 adress. Since the
  proxy only support IPv4 for now, we replace
  localhost by 127.0.0.1, to fix this

app/src/inverter_base.py

@@ -62,7 +62,7 @@ class InverterBase(InverterIfc, Proxy):
 
         # now explicitly call garbage collector to release unreachable objects
         unreachable_obj = gc.collect()
-        logging.info(
+        logging.debug(
             f'InverterBase.__exit: freed unreachable obj: {unreachable_obj}')
 
     def __del_remote(self):