[RM-6263] Unit test for continuum validation in refitfirstpass

Created on 2021-01-22 11:35:17 by Mira Sarkis. % Done: 0

For the case of "refitfirstpass":

• Design a unit test for testing the continuum parameters used for firstpass and secondpass
• expected results: both continuum should have the same parameters except the redshift value and the fitted amplitude