Problem with the update for the scheme choice with Gas Combustion

Hi,

When you use the Gas Combustion model with the D3P model (I didn't try for the other combustion models) and with non adiabatic option to activate the enthalpy, the choice for the scheme is not taking account when I compare the setup.log for the 3 variables :
- enthalpy
- mixture_fraction
- mixture_fraction_variance

Regards,

Yohann

Reproduce the Gas Combustion case with the D3P model and the non-adiabatic enthalpy option, then compare setup.log for enthalpy, mixture_fraction, and mixture_fraction_variance. Trace where the selected scheme is recorded and verify that the setup.log entries reflect the scheme choices for all three variables.

Written by the indexing model from the issue text.