Batchinstaller reads the value for the auth_file from the auth_method_parameter

Current Situation

when defining the auth method public_key in the batch installation xml configuration file and defining the value for the auth_file in the section installation the value for the auth_file is public_key. The configured value is not used

Desired Behaviour

when defining the auth method public_key in the batch installation xml configuration file and defining the value for the auth_file in the section installation the specified value for the auth_file should be used