mpitcel

Further analysis occurs at https://github.com/techservicesillinois/awscli-login/issues/97

Are we OK to move forward with merging, etc. if the tests are not all passing?

> The cache validation POST error we're seeing is a known (intermittent) issue we have documented over here: [techservicesillinois/cache-validation#23](https://github.com/techservicesillinois/cache-validation/issues/23) Can this error then be ignored for now and not taken...

FYI This PR will need to be updated from the `master` branch before it can be merged

@ddriddle , is this Pull Request still active?