Disable auth for tests

[br648]

Checklist

• [x] Appropriate branch selected (all PRs must first be merged to dev before they can be merged to master)
• [x] Any modified or new methods or classes have helpful JavaDoc and code is thoroughly commented
• [x] The description lists all applicable issues this PR seeks to resolve
• [x] The description lists any configuration setting(s) that differ from the default settings
• [x] All tests and CI builds passing

Description

73 exceptions are logged as part of CI for failed authentication. Auth isn't needed for the majority of unit tests, so where the exception is thrown, auth has been disabled. It is re-enabled once the test has completed so as not to impact tests that do require auth.

This PR (where applicable) disables auth which will remove the exceptions logged and speed up testing... a little.

[br648]

Is there no better place to put all these calls? Feels annoying to have to repeat it so many times

@miles-grant-ibigroup not without a more indepth refactor. Some of the tests require auth so a global update (say in DatatoolsTest.setUp()) is not possible. If I was to do this, I'd have to update all the tests that require auth (to enable it), so I don't think we'd be any further forward.