Dont use wheel for mpi4py

Author: brownbaerchen

pySDC/projects/compression/Docker/install_pySDC.sh

@@ -18,10 +18,9 @@ cd /pySDC
 pip install -e .
 python -m pip install pytest
 python -m pip install coverage
-python -m pip install mpi4py
+python -m pip install --no-binary :all: mpi4py
 
 python -c "from mpi4py import MPI"
-mpirun -np 2 python -c "from mpi4py import MPI"
 
 # go back to original working directory
 cd $current_dir