hdf5_ep

[svn-r24740] Bug fix: HDFFV-8684
h5committest failed in platypus because cmakehdf5 failed in installation because cmake generates
a install-tarball based on incomplete version number (subrelease string is missing).

Solution:
Fixed $HDF5_PACKAGE_VERSION to contain the subrelease string.
Fixed $HDF5_PACKAGE_VERSION_STRING to be the same as $HDF5_PACKAGE_VERSION.

Tested: jam and platypus in both trunk and v18 branches because the current 
version number is trunk has a null sub-release and v18 has a non-null sub-release.
That covers both grounds.