wrong FSHelloMode reported in case Controller uses strange FSU parameters

If the device supports FSU using the certification testcase FSU of new testtool ART 2.33.3 shows an error.

The testcase uses mode "Issue Hello with additional delay after LinkUp" but sets the additional delay to 0. The current implementation will incorrectly store the mode "Issue Hello after LinkUp" in this case which is technical identical but still wrong.