Added version checking to avoid deprecation warning in load_csa (#883)

[KirilBourakov]

Added version checking as described by #883 . I'm working under the assumption that 'fully_trusted' is correct here, as documentation tells me that matches the functionality of previous versions of python.

If there are any issues, please let me know and I'll do my best to fix.

[jameswilburlewis]

Thanks for contributing! I finally remembered that the test script won't run to completion for most pull requests, because your fork doesn't have the MMS team credentials stored as github secrets. But your changes look good, so I'll go ahead and merge them in.