Spring Security Create Embedded LDAP Support Classes

Currently it requires multiple beans to support embedded ldap support.

    @Bean
    UnboundIdContainer ldapContainer() {
        UnboundIdContainer container = new UnboundIdContainer("dc=springframework,dc=org",
                "classpath:users.ldif");
        container.setPort(0);
        return container;
    }

    @Bean
    DefaultSpringSecurityContextSource contextSource(UnboundIdContainer container) {
        return new DefaultSpringSecurityContextSource("ldap://localhost:" + container.getPort() + "/dc=springframework,dc=org");
    }

It would be nice to provide single builder that creates/shuts down the embedded database and creates a DefaultSpringSecurityContextSource similar to Spring's EmbeddedDatabaseBuilder.