OpenID Connect - Validate JWT tokens before consumption

[samuelgrant]

Is your feature request related to a problem? Please describe.
Need to add validation of JWT tokens in both the GiceController and EveController callback methods.

Gice Documentation: N/A

Eve Online SSO documentation: https://github.com/esi/esi-docs/blob/master/docs/sso/validating_eve_jwt.md

[samuelgrant]

This has been done with for GICE, I'm happy with the solution.