Unified IsNewAware and IdAware to EntityMetadata. Refactored base repository support to use this abstraction. Introduced RepositoryMetadata and DefaultRepositoryMetadata implementation to capture all the additional information that we need around a repository interface. Adapted factory API to use this abstraction. Opened up method parameter and return types to prepare enabling the usage of the infrastructure for interfaces that do not extend Repository interface.
Query method names now support Distinct in method name prefixes. Beyond that I laxed the prefix constraints a little so that it can potentially contain anything before a 'By' separator:
- findByLastname -> simply query
- findUsersByLastname -> simple query
- findUsersDistinctByFirstname -> distinct query
- findDistinctUsersByFirstname -> distinct query
- findDistinctByLastname -> distinct query
