final mpiwrap / mpidummy bits (!1480) · Merge requests · Podhorszki, Norbert / ADIOS2 · GitLab

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Podhorszki, Norbert requested to merge github/fork/germasch/pr/more_unified_mpi into release Jun 07, 2019

Created by: germasch

This PR has three changes, which are actually independent of each other:

use MPI_COMM_NULL to keep track of having been invoked via serial API
remove unused MPI_File mpidummy implementation
minor cleanup in Transport.

Some more details are in the commit messages.