BUGFIX: Parallel rendering of particles

Fix issue when rendering particles in parallel within ParaView. The
VTK pipeline needs to know how many partitions need to be rendered.
Since each process will read a single partition, MAX_NUMBER_OF_PIECES
to the total number of ranks.
BUGFIX: Parallel rendering of particles

Fix issue when rendering particles in parallel within ParaView. The
VTK pipeline needs to know how many partitions need to be rendered.
Since each process will read a single partition, MAX_NUMBER_OF_PIECES
to the total number of ranks.

git-svn-id: https://svn.alcf.anl.gov/repos/DarkUniverse/hacc/trunk/cosmotools@1496 952bdfbe-fa2e-45c0-a9ae-ac90d4a62daf
Merge branch 'svn/trunk'