[Paraview] MPI-aware reader plugin only has rank 0

[Utkarsh Ayachit]

My bad -- can't believe I made such a rookie mistake. Here's the correct script:

from vtkPVClientServerCoreCorePython import vtkProcessModule
print "rank=", vtkProcessModule.GetProcessModule().GetPartitionId()
print "total=", vtkProcessModule.GetProcessModule().GetNumberOfLocalPartitions()