On ada : allow more than 4 OMP

[jgipsl]

Currently at ada it is not possible to use more than 4OMP in hybrid mode using default(IBM) MPI Environement. Otherwise following lines will make it exit : libIGCM_sys_ada.ksh start line 1102-1124 :

          if ( ${OK_PARA_OMP} ) ; then
            # Check if the number of threads is correct
            case ${comp_proc_omp_loc} in
            1|2|4)
              IGCM_debug_Print 1 "You run ${ExeNameOut} on ${comp_proc_omp_loc} OMP threads on IBM MPI Environment"
              IGCM_debug_Print 1 "Beware : it may you use more CPU than needed."
              IGCM_debug_Print 1 "Think to the Intel MPI Environment to do what you want to do !"
              ;;
            8|16)
              IGCM_debug_Exit "ERROR with OMP parameters !"
              IGCM_debug_Print 2 "Beware : ${comp_proc_omp_loc} is too much for MPMD mode"
              IGCM_debug_Print 2 "You will use more CPU than needed : try to use Intel-MPI environment to do such a thing !"
              IGCM_debug_Verif_Exit
              ;;
            *)
              IGCM_debug_Exit "ERROR with OMP parameters !"
              IGCM_debug_Print 2 "${comp_proc_omp_loc} is not possible as number of OMP threads"
              IGCM_debug_Print 2 "Only 1,2,4,8,16 as number of OMP threads are possible "
              IGCM_debug_Verif_Exit
              ;;
            esac

          fi

This has been added for protection if running the coupled model. But for the forced model it is really useful to have more than 4 OMP. I'd like to move the 8 in the first case.

[jgipsl]

Done in rev [1357]