[#1224] propogate the NotAuthorized exception extra messages to api
[#1224] fix error messages in tests
Merge branch 'master' into 1224-not-auth-except-msg
[#1224] change tests to check for error type instead of message
Merge pull request #1224 from okfn/1224-not-auth-except-msg

propogate NotAuthorized exception message