"bad realm" error should return 4XX error

[Brendan Schlaman]

TL;DR

If a realm doesn't have a jwks config, https://encv.org/jwks/{realm} returns a 500 error.

Expected behavior
Should return a 4XX error

[Brendan Schlaman]

/assign @sethvargo

[Weston Haught]

/assign

[Seth Vargo]

Thanks for finding this in the noise Brendan! And thanks for fixing it Weston!