Avoid unncessary level setting

Author: albertobruin

Diff for: kubernetes/client/configuration.py

@@ -265,13 +265,17 @@ def debug(self, value):
         if self.__debug:
             # if debug status is True, turn on debug logging
             for _, logger in six.iteritems(self.logger):
+                if logger.level == logging.DEBUG:
+                    continue                
                 logger.setLevel(logging.DEBUG)
             # turn on httplib debug
             httplib.HTTPConnection.debuglevel = 1
         else:
             # if debug status is False, turn off debug logging,
             # setting log level to default `logging.WARNING`
             for _, logger in six.iteritems(self.logger):
+                if logger.level == logging.WARNING:
+                    continue                
                 logger.setLevel(logging.WARNING)
             # turn off httplib debug
             httplib.HTTPConnection.debuglevel = 0