CCTBX tests should not have a phenix dependency

[graeme-winter]

This is inconsistent with the two licenses and thus means that open source users cannot run tests

https://github.com/cctbx/cctbx_project/commit/e89297fb8c5440b870fb828ef3ec6cfeab3acffe

(h/t to @ndevenish for identifcation)

@terwill I think you added this? So would probably be good to have the test data in a cctbx-accessible area or pick a different test file?

This killed our DIALS nightly builds but we have not had a chance until now to find out what killed it...