This fixes CALIPSO simulator that shows abnormal spatial distribution.
The root cause is that the pressure cutoff for MG calculation leads to
precipitation flux arrays containing undefined values above the cut off
level.

Fixes for precipitation flux calculations in MG microphysics are also included.

 modified:   components/cam/src/physics/cam/cospsimulator_intr.F90
 modified:   components/cam/src/physics/cam/micro_mg1_0.F90
 modified:   components/cam/src/physics/cam/micro_mg2_0.F90
 modified:   components/cam/src/physics/cam/micro_mg_cam.F90

 [BFB]

The fixes to make precipitation flux at surface consistent with surface precipitation rate
may cause over-estimating the effect cloud liquid and ice in COSP simulated lidar/radar signal
through the separate calculations of rain/snow reflectivity.

This modification is to not include liquid and ice condensate fluxes for MG2 in micro_mg_cam.F90
and undo all changes in precipitation flux calculations for MG1.

modified:   components/cam/src/physics/cam/micro_mg1_0.F90
modified:   components/cam/src/physics/cam/micro_mg_cam.F90

[BFB]