case.setup error with mvapich2 on Compy

For Intel compiler
```
ls /share/apps/mvapich2/2.3.1/intel
18.0.0 19.0.3 19.0.4 20.0.0

...
./create_newcase --compiler=intel --mpilib=mvapich2 --case intel_mvapich2_X_f19_g16 --compset X --res f19_g16
cd intel_mvapich2_X_f19_g16
./case.setup

ERROR: module command /share/apps/modules/bin/modulecmd python load cmake/3.11.4 intel/19.0.5 mvapich2/2.3.1 netcdf/4.6.3 pnetcdf/1.9.0 mkl/2019u5 failed with message:
The combination of compiler and MPI does not appear to be built yet
```
For PGI compiler
```
ls /share/apps/mvapich2/2.3.1/pgi
18.10 19.1 19.4c 19.5 19.7

...
./create_newcase --compiler=pgi --mpilib=mvapich2 --case pgi_mvapich2_X_f19_g16 --compset X --res f19_g16
cd pgi_mvapich2_X_f19_g16
./case.setup

ERROR: module command /share/apps/modules/bin/modulecmd python load cmake/3.11.4 pgi/19.10 mvapich2/2.3.1 netcdf/4.6.3 pnetcdf/1.9.0 mkl/2019u5 failed with message:
The combination of compiler and MPI does not appear to be built yet
```
So for mvapich2/2.3.1, it cannot combine with intel/19.0.5 or pgi/19.10 so far.

Related PRs:
Makes Intel 19.0.5 as a default compiler on Compy (PR #3210)
Updates PGI compiler to version 19.10 (PR #3382)