hdf5_ep

[svn-r16758] The test of family file compatibility with v1.6 used the original family files under the library
source directory.  Since the test opens the files with write mode, it's safer to make copies of 
the original files.  I added the copying step in test_family_compat in vfd.c.  I changed the 
Makefile.am to clean up the copied files.  I created a new family_v16_00000.h5 with v1.6 library.

Tested on jam - supposed to be simple change.