LEDGE-255: Coral entities for storing rate limiting configuration
LEDGE-255: data storage
LEDGE-255: rename ratelimit -> accesslimits
LEDGE-255: UI scaffolding
LEDGE-255: moved urlPattern to a separate resource class, ProtectedItem
resources will be parents of RuleResources
LEDGE-255: REST endpoints for rules & actions management
preparing upgrade scripts for release 2.28.5