Improve OpenID Connect 1.0 Logout Endpoint

[jgrandja]

• Initialize SessionRegistry only if OIDC is enabled
• Remove attribute OidcLogoutAuthenticationToken.sessionInformation
• Add OidcLogoutAuthenticationToken.isPrincipalAuthenticated()
• Add check to ensure ID Token is active before processing the logout request

Related gh-1068

[haojava]

@jgrandja Will this feature be added in 0.4.x ?

[jgrandja]

@haojava No. New features can only be added in main which is currently 1.1. The 0.4.x branch will accept bug and security fixes only.