Bump database_cleaner from 1.6.1 to 1.6.2
Bump database_cleaner from 1.6.1 to 1.6.2

Bumps [database_cleaner](https://github.com/DatabaseCleaner/database_cleaner) from 1.6.1 to 1.6.2.
- [Changelog](https://github.com/DatabaseCleaner/database_cleaner/blob/master/History.rdoc)
- [Commits](https://github.com/DatabaseCleaner/database_cleaner/compare/v1.6.1...v1.6.2)
openpolitics/votebot,openpolitics/votebot,openpolitics/votebot