vchoi_fork

[svn-r3243] Purpose:
    Bug fix
Description:
    H5P_DATASET_XFER was the name from the beginning through 1.2.  It was
    changed to H5P_DATA_XFER on v1.3.0.  Then it was changed back to
    H5P_DATASET_XFER right before the release of v1.4.0-beta2.
    Define an alias here to help applications that had ported to v1.3.
    Should be removed in later version.
    #define H5P_DATA_XFER H5P_DATASET_XFER

    Also removed the v1_2 compat condition since it is a v1.3 compat
    issue now.
Platforms tested:
    modi4 -64 parallel.