…es (fixes #4120)

* SpringBoot+Keycloak relies on SpringSecurity which doesn't get roles
  from JWT! - so we now need -Dhawtio.roles=*, because we always have
  default supported role principal class
* SpringBoot and Quarkus with Keycloak use new option passed to
  JavaScript keycloak.logout(), so LogoutServlet can actually do Spring
  logout
* We need load-on-startup for AuthConfigurationServlet
* Form auth method is not added with there's only Keycloak enabled
* We now have new userPrincipalClasses option - so scenario where OIDC
  Login module gets user from JWT, _another_ login module (like LDAP
  from Artemis) can augment JAAS subject with actual roles - and it
  works!