LPS-34567 Copy-paste LayoutLocalServiceHelper
LPS-34567 Add new interface and Util class
LPS-34567 Update util-spring.xml
LPS-34567 Site template page import causes ConstraintViolation
LPS-34567 Delete old LayoutLocalServiceHelper
LPS-34567 Refactor LayoutLocalServiceHelper
LPS-34567 Update reference to LayoutLocalServiceHelper