Better error messages

[Fryguy]

We intentionally decided to hide error messages in order to prevent security issues with respect to spelunking. However, I think we got a little too aggressive, and there is no information at all when something goes wrong. This RFE is to loosen that up a little bit.

One example that I frequently run into is that users successfully authenticate, but then their groups are not set up properly. We get an audit log stating why, but the user response to the API is just "Authentication Failed"

[miq-bot]

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