Better error-handling with custom settings parsing

Author: mdmintz

seleniumbase/core/mysql.py

@@ -23,7 +23,7 @@ def __init__(self, database_env='test', conf_creds=None):
         db_user = settings.DB_USERNAME
         db_pass = settings.DB_PASSWORD
         db_schema = settings.DB_SCHEMA
-        if sb_config.settings_file:
+        if hasattr(sb_config, "settings_file") and sb_config.settings_file:
             override = settings_parser.set_settings(sb_config.settings_file)
             if "DB_HOST" in override.keys():
                 db_server = override['DB_HOST']