DatabaseCleaner/database_cleaner — pull request #303 by jgonera (2014-12-10 01:33:31+00:00)
Title: Specify full namespace for Mysql2Adapter

Followup fix for 8d0016e (PR https://github.com/DatabaseCleaner/database_cleaner/pull/265). This probably worked in some cases because of weird
magic Rails does to constant lookup [1].

[1] http://urbanautomaton.com/blog/2013/08/27/rails-autoloading-hell/