hdf5_ep

[svn-r16658] merge from trunk 16656
#1402 (B1) h5repack does not preserve creation order indexing. 
ISSUE : h5repack does not handle group creation order flags. 
ACTION: call H5P(g)(s)et_link_creation_order functions when handling groups, add new groups with these flags to the test generation program, and verify results in the test program. 
TEST: in the test program, function that compares property lists, added code to verify groups
DOCS: Added the note to RELEASE.txt: "h5repack now handles group creation order. PVN - 2009/4/2 - 1402".