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Make sure properties export only happens from root process - #1864
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pshriwise
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Thanks @paulromano! Sorry I didn't catch this during review for the original PR for this feature.
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Make sure properties export only happens from root process
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If an external application calls
openmc_properties_exportfrom multiple processes, it will lead to HDF5 errors due to multiple processes trying to create the same file. This PR simply ensures that only one process will export properties.