fix deleteByIdentity in RepositoryOnMemory
Merge pull request #19 from hase1031/feature/repository_on_memory_delete

OnMemoryリポジトリのdeleteByIdentityの修正
The version was updated to snapshot.
fix deleteByIdentites in AsyncEntityWriter
Merge pull request #20 from hase1031/feature/fix_delete_by_identities

fix deleteByIdentites in AsyncEntityWriter