Add is_backorderable to variant and small RABL view
fixes #5595
Update MoveOrderTokenFromTokenizedPermission migration to work w/ jruby

jruby mysql adapter uses adapter_name 'MySQL'. Not recognizing this causes migrations to bomb out on jruby due to invalid SQL syntax.

https://github.com/jruby/activerecord-jdbc-adapter/blob/master/lib/arjdbc/mysql/adapter.rb#L109

fixes #5597