Fix error handling in scitoken tests
This MR fixes a failing test by updating the error handling for mismatching token claims.
As of scitokens 1.7.3 the aud claim isn't validated by SciToken.deserialize so the error handling is subtly different.
This MR fixes a failing test by updating the error handling for mismatching token claims.
As of scitokens 1.7.3 the aud claim isn't validated by SciToken.deserialize so the error handling is subtly different.