Refs #20678 - Refactor eea.cache to automatically invalidate memcache

- Cleanup hardcoded DEPENDENCIES
- Add dependency by obj UID in order to easily invalidate all memcache
  per object;
- Add memcache.invalidate browser view in order to easily manually
  invalidate memcache per object;
- Possibility to invalidate relatedItems memcache;
- Possibility to invalidate backRefs memcache;
- Fix package dependencies.
Refs #20678 - Fix eea.cache demo Plone 4 buildout