Refs #8739 Update ConvFit to match new parameters.
Refs #8739 Update reference results.

The fit is still the same, but the x-values have changed because we're now using ConvertSpectrumAxis.
Merge branch 'feature/8739_temp_param_in_convfit' into develop

Refs #8739

Conflicts:
	SystemTests/AnalysisTests/ISISIndirectInelastic.py