Fix to make Python running in parallel to properly import paraview.simple.

Before it assumed that the process was running a client.

Change-Id: Ia908d5eadfd285d635aba1444c38acf2c50b1759
Adding Python test with MPI for importing paraview.simple.

Change-Id: I4abbb7db22ee2148e83b29d146cbf0efad99c706
Merge topic '14545_parallel_python_import_paraview.simple' into next

ee30a6f1 Adding Python test with MPI for importing paraview.simple.
9d6784e4 Fix to make Python running in parallel to properly import paraview.simple.