remove nested structures because of the fact that swig cannot handle this

remove nested structures because of the fact that swig cannot handle this
now we no more need the bad duplicate definitions of eDVBFrontendParametersSatellite/Cables/Terrestrial content
i.e. eDVBFrontendParametersSatellite.System_DVB_S or eDVBFrontendParametersSatellite.FEC_Auto....