UnitOfWork cleanup.
Fix issue with ClassMetadataFactory not inheriting association mappings properly.
Add test to ensure embed one and embed many identifiers can be modified.
Running fabpot/PHP-CS-Fixer.
Test for embedded documents with same id should not be the same instance.
Remove code in PersistenceBuilder::prepareInsertData() that is never called.
Remove commit order calculator. We don't need it.
Implement support for read only objects.