Added REST APIs
Added REST API for getting all stored permissions, user group mapping, role group mapping, delete role group mapping, role permission mapping. Also added ldap user backend authentication mechanism.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Added REST API for getting all stored permissions, user group mapping, role group mapping, delete role group mapping, role permission mapping. Also added ldap user backend authentication mechanism.