[db] fix logs

pyheatpump/db.py

@@ -55,7 +55,8 @@ class DB():
 
     @staticmethod
     def sql(query, params={}):
-        logger.debug(query, params)
+        logger.debug('Query : %s', query)
+        logger.debug('Params : %s', params)
 
         if not DB.connect():
             raise Exception('Can\'t connect to DB')