PolyhedralGrid: use MPIHelper's default communicator for CollectiveCommunication.#431

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dr-robertk wants to merge 3 commits intoOPM:masterfrom dr-robertk:PR/bugfix-polyhedral-comm

+56-47

Commits on Dec 11, 2019

[bugfix][PolyhedralGrid] use MPIHelper's default communicator for
Robert Kloefkorn
committed
[bugfix][CpGrid::Entity] added specialized referenceElement method for
Robert Kloefkorn
committed

Commits on Dec 16, 2019

[bugfix][PolyhedralGrid] Only create Geometry implementation when
Robert Kloefkorn
committed