[RM-6542] Perform the second pass without templates ratio

Created on 2021-06-16 11:16:49 by Vincent Le Brun. % Done: 0

There are some extreme objects which are not well represented by the emission lines ratio templates, which gives wrong solutions for easy objects. As the correct solution is always among the 5 solutions from the firs pass, the second pass should be performed in free mode (except for the doublet ratio and probably the Balmer and ratioline rules).
depending on tests results, this could be as a function of SNR, is low SNR spectra still require template ratio to avoid too many free parameters in the fit