[svn-r414] Problem:

    Parallel File open has a racing condition if file already exists.
    Some processes see file exists, then truncate it (some system
    by remove and create).  Some processes does not see the file
    exist, then attempt to just create it.  Inconsistency.
Solution:
    Instead of opening the file with COMM_SELF (which results in
    racing condition in routine that calls it), open it with the
    communicator in access_parms.  (This assumes this access call
    must be called collectively.)
Platform tested:
    O2K.

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