added rake task to test migration process
added rake task to test migration process

Undev/redmine_undev_git,pawwal/redmine_undev_git,pawwal/redmine_undev_git,Restream/redmine_undev_git,Undev/redmine_undev_git,pawwal/redmine_undev_git,Undev/redmine_undev_git,Restream/redmine_undev_git,Restream/redmine_undev_git