Lock to database_cleaner 0.5.0.  0.5.2 has a conflict with activerecord-jdbc-adapter and so doesn't work with JRuby.
Lock to database_cleaner 0.5.0.  0.5.2 has a conflict with activerecord-jdbc-adapter and so doesn't work with JRuby.

NUBIC/aker,NUBIC/aker