hdf5_der

[svn-r24736] 1) Correct bug: uncork object in H5Gint.c H5Dint, H5T.c instead of H5O.c.
2) Modify H5Fstart_swmr_write() to allow opened objects: groups and datasets only (but not named datatypes and attributes)
   for this release.
3) Add tests for corking operations, re-group tests.
4) hl/tools/h5watch: fix a bug for h5watch; hl/test: remove concurrent test for H5LD* since they are basically the same 
   as the tests for h5watch.
Tested on jam, koala, ostrich, platypus.