Tracers not taken into account with Spalart-Allmaras turbulence model in 3D

If using VERTICAL TURBULENCE MODEL = HORIZONTAL TURBULENCE MODEL = 4 (Spalart-Allmaras turbulence model) and tracers, tracer diffusion is not treated for this turbulence model.

added module:telemac-3d type:bug labels

By now with Spalart-Allmaras, only viscosity for velocities is computed and nothing is done for tracers.

Noted in one answer of http://www.opentelemac.org/index.php/kunena/21-telemac-3d/13934-diffusion-of-velocities-and-tracers

closed with commit d39e4f31

mentioned in commit d39e4f31

mentioned in commit fcaeb5a2