Set communicator in hoomd.write.GSD.write
Set communicator in hoomd.write.GSD.write

This shouldn't be necessary but is currently since
``GSDDumpWriter::analyze`` requires the communicator be set for domain
decomposed simulations.

joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue