Fixes DCA and Tests

- The test relied on an error message that references creation but
  during read operations the error message says "open" in lieu of
  creation. The patch just adds another case to observe.
- The error message produced by either h5py or HDF5 varies depending on
  HDF5 versions. This patch adds more the known (albeit mispelled) error
  messages.
Merge pull request #1766 from lukecampbell/dca

TEST - Fixes DCA and Tests