HFVHANDLER-199, continue implementing the DMR cache. Testing.
HFVHANDLER-199, continue implementing the DMR cache. Testing.

OPENDAP/hdf5_handler,OPENDAP/hdf5_handler,OPENDAP/hdf5_handler,OPENDAP/hdf5_handler,OPENDAP/hdf5_handler,OPENDAP/hdf5_handler