Make the harmonization attribute of the bot private

that way we can exclude it from attribute listings of the bots
attributes.

Author: Birger Schacht

intelmq/lib/bot.py

@@ -108,6 +108,8 @@ class Bot(object):
     # Collectors with an empty process() should set this to true, prevents endless loops (#1364)
     __collector_empty_process: bool = False
 
+    _harmonization: dict = {}
+
     def __init__(self, bot_id: str, start: bool = False, sighup_event=None,
                  disable_multithreading: bool = None):
 
@@ -241,6 +243,10 @@ def catch_shutdown():
         if start:
             self.start()
 
+    @property
+    def harmonization(self):
+        return self._harmonization
+
     def __handle_sigterm_signal(self, signum: int, stack: Optional[object]):
         """
         Calls when a SIGTERM is received. Stops the bot.
@@ -815,7 +821,7 @@ def __log_configuration_parameter(self, config_name: str, option: str, value: An
 
     def __load_harmonization_configuration(self):
         self.logger.debug("Loading Harmonization configuration from %r.", HARMONIZATION_CONF_FILE)
-        self.harmonization = utils.load_configuration(HARMONIZATION_CONF_FILE)
+        self._harmonization = utils.load_configuration(HARMONIZATION_CONF_FILE)
 
     def new_event(self, *args, **kwargs):
         return libmessage.Event(*args, harmonization=self.harmonization, **kwargs)