hdf5_ep

[svn-r22322] Description:
  The ph5diff (parallel h5diff) can intermittently hang in parallel mode
  when comparing the two HDF5 files that contains common name objects with 
  different object types.  (HDFFV-8003)
  Skip only the specific test for parallel until the fix has made.

Tested:
jam (linux32-LE), koala (linux64-LE), ostrich (linuxppc64-BE), tejeda (mac32-LE), linew (solaris-BE)