Merge 6 additional Spring Security projects into grails-spring-security-core

[jamesfredley]

Issue description

This will massively reduce release time and ensure compatibility across the Grails Spring Security plugins.

Transition from TOML to gradle.properties for versions not in grails-bom.

https://github.com/grails/grails-spring-security-rest - Grails plugin to implement token-based, RESTful authentication using Spring Security
https://github.com/grails/grails-spring-security-ui - The Spring Security UI plugin provides CRUD screens and other user management workflows.
https://github.com/grails/grails-spring-security-oauth2 - Spring security Oauth Grails 3 plugin
https://github.com/grails/grails-spring-security-acl
https://github.com/grails/grails-spring-security-cas
https://github.com/grails-plugins/grails-spring-security-ldap