add test case based on OpenFOAM tutorial by J. Guerrero to compare p, U, T, rho from compressible rhoPimpleFoam solver to cfdemSolverRhoPimple
add test case based on OpenFOAM tutorial by J. Guerrero to compare p, U, T, rho from compressible rhoPimpleFoam solver to cfdemSolverRhoPimple