Don't fail if the JWK settings aren't set
Don't fail if the JWK settings aren't set

JWKs are used for micro-frontends and OAuth scopes.  The Ironwood
installation process doesn't yet create the JWKs needed.  For Ironwood,
at least don't fail trying to use the empty settings.  By default,
micro-frontends and OAuth scopes will be unavailable.

edx-solutions/edx-platform,edx-solutions/edx-platform,edx-solutions/edx-platform,philanthropy-u/edx-platform,edx-solutions/edx-platform,philanthropy-u/edx-platform,philanthropy-u/edx-platform,philanthropy-u/edx-platform