Rebase to rpm 4.16.0 alpha
    
    - Add bconds for and enable sqlite, ndb and bdb_ro database backends
    - Add bcond for disabling bdb backend
    - Drop lmdb bcond, the backend was removed upstream
    - Ensure all database backend files are owned
    - Fix external environment causing test-suite failures in spec build
    - Re-enable hard test-suite failures again