Bugfix in Thompson MP, pass correct timestep to core routine

[climbfuji]

This PR fixes a bug where the incorrect (full) time step was passed down to Thompson MP instead of the time step for the subcycles. This should fix the decline in precipitation that the early testing has shown (to be confirmed).

Fixes #686 .

Testing

See ufs-community/ufs-weather-model#670

Dependencies

#684
NOAA-EMC/ufsatm#334
ufs-community/ufs-weather-model#670

[ligiabernardet]

This bug fix looks good to me. I am looking forward to seeing which impact is has in the runs.

[gthompsnWRF]

Same comment as Ligia! Thanks Dom.

[climbfuji]

This PR seems to fix the bug of declining hydrometeors. Output from a C768L127 run, 120h forecast below. The tracer concentrations are max/min/mean.

nsub=2

   0:  sphum  2.2201141E-02  3.6418424E-08  9.2604319E-03
   0:  liq_wat  4.3379692E-03  0.0000000E+00  2.5281784E-06
   0:  ice_wat  5.1964918E-04  0.0000000E+00  1.3874734E-08
   0:  rainwat  1.1166411E-02  0.0000000E+00  3.0823865E-06
   0:  snowwat  8.4137125E-03  0.0000000E+00  2.9077935E-06
   0:  graupel  8.5209785E-03  0.0000000E+00  4.6990341E-08
   0:  water_nc  1.9372197E+09  0.0000000E+00   1475812.
   0:  ice_nc  4.5012752E+07  0.0000000E+00   949.7925
   0:  rain_nc   510593.4      0.0000000E+00   59.16530
   0:  o3mr  1.7738716E-05 -1.6795166E-09  5.6456997E-08
   0:  liq_aero  7.3091621E+10   4814625.      1.3743094E+09
   0:  ice_aero  5.7892256E+07   183.6271       1968730.
   0:  sgs_tke   205.3905      9.9245663E-05   1.082427

nsub=4

   0:  sphum  2.2648370E-02  2.8015471E-08  9.2628356E-03
   0:  liq_wat  4.3295817E-03  0.0000000E+00  2.8611310E-06
   0:  ice_wat  3.7544995E-04  0.0000000E+00  1.1459525E-08
   0:  rainwat  1.3878725E-02  0.0000000E+00  2.8739821E-06
   0:  snowwat  7.5024036E-03  0.0000000E+00  2.9518787E-06
   0:  graupel  7.0657870E-03  0.0000000E+00  4.1263071E-08
   0:  water_nc  1.9828993E+09  0.0000000E+00   1562736.
   0:  ice_nc  4.5707220E+07  0.0000000E+00   889.5925
   0:  rain_nc   542038.2      0.0000000E+00   61.62212
   0:  o3mr  1.7809110E-05 -1.6919967E-09  5.6495580E-08
   0:  liq_aero  8.7460119E+10   4268268.      1.3799584E+09
   0:  ice_aero  5.8301256E+07   262.5815       1970508.
   0:  sgs_tke   208.4773      9.9295110E-05   1.079270

[climbfuji]

This PR has been pulled into #685 and will be merged as part of it.