hdf5_der

Merge pull request #231 in HDFFV/hdf5 from ~DEROBINS/hdf5_der:develop to develop

Fix production mode cache macro.

* commit '54629912ebf3aa7feb454502fce659b61f038671':
  Fixed a macro in H5Cpkg.h that was only updated in the version that is used in develop/debug mode.