Use the provided groupID as the grpcomm signature #1927
Merged
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If the user provides a groupID (e.g., in a PMIx_Group op), then use that as the signature of any involved grpcomm operations instead of the proc array. This allows the same collection of procs to participate in multiple PMIx_Group operations at the same time since PMIx requires the user provide a unique grpID for each operation.