2022-10: Thermal Model Exception

[OPMUSER]

A user running a full field thermal model, got the following exception:

Program threw an exception: EclProblem::updateCompositionChangeLimits_()) failed:Invalid thermal conductivity approach: 0

This was because the THCONR keyword in the GRID section was missing, adding the following fixed the problem:

--                                                                              
--       DEFINE GRID BLOCK ROCK-FLUID THERMAL CONDUCTIVITY FOR ALL CELLS                           
-- 
THCONR
         3060*25.0                                                              / 

Rather than an exception, we should catch this with an error message of the form:

Error: Missing Thermal Model Keywords:
   Thermal Conductivity not defined, see THCONR, THCGAS, THCOIL, etc. keywords
   in the GRID section

or something similar.