LPS-48728 Rename some classes as agreed with Adolfo. We rename: RepositoryEventHandler -> RepositoryEventTrigger (because an EventHandler is like an EventListener, not the object that delivers the event) RepositoryConfiguration -> RepositoryDefinition (because we already use the concept of repository configuration for the settings of external repositories) RepositoryCatalog -> RepositoryDefinitionCatalog RepositoryRegistryPlugin -> RepositoryDefiner (because it is the object that creates the RepositoryDefinition, and to remove ambiguity with the other Plugins)