private static Service newService(final String id) {
        return RegisteredServiceTestUtils.getService(id);
    }
High-level MFA functionality tests that leverage registered service metadata
to drive authentication policy.

@author Marvin S. Addison
@since 4.0.0
core/cas-server-core-webflow-mfa/src/test/java/org/apereo/cas/MultifactorAuthenticationTests.java