Debug log when skipping api_versions request with pre-configured api_version

Author: dpkp

kafka/conn.py

@@ -521,6 +521,7 @@ def _try_api_versions_check(self):
             if self.config['api_version'] is not None:
                 self._api_version = self.config['api_version']
                 self._api_versions = BROKER_API_VERSIONS[self._api_version]
+                log.debug('%s: Using pre-configured api_version %s for ApiVersions', self, self._api_version)
                 return True
             elif self._check_version_idx is None:
                 request = ApiVersionsRequest[self._api_versions_idx]()