hdf5

Purpose: Fixed Packet Table issues
Description:
    - Removed calls to H5Tget_native_type from PT APIs because it is up to
      the application, whether it wants the buffer to be read into memory
      in the machine’s native architecture.  Currently, however, the PT
      doesn't allow an application to specify memory datatype.  Perhaps,
      a new API can be added to provide that capability.
    - Added calls to H5Tcopy to H5PTcreate/H5PTcreate_fl/H5PTopen to save
      a copy of the application's datatype or the dataset's datatype.
    - Added various missing H5Tclose to the packet table tests, and various
      error checkings.
    Note: leave out changes to test_packet_vlen.c for this commit to wait
          on QAK about merging the commit
          ec2fbe0883f9e76df60bcfbebbd4b6f62d5a09e6 [svn-r30158] first.
    This commit is associated with develop's commits:
	14e308b2e6eada778818abf53949ceef0e7b2a34
        be613da6b804e56a51f43a053bf35d898dccb420
Platforms tested:
    Linux/32 2.6 (jam)
    Linux/64 (jelly)
    Darwin (osx1010test)