Request scoped bean databaseName+"DB" is not working

As per http://gorm.grails.org/latest/mongodb/manual/index.html#lowLevelApi

> A request scoped bean is also available for the default database (typically the name of your application, unless specified by the databaseName config option, plus the suffix "DB").

This doesn't seem to be working. Can you please update the documentation or if it's a bug please fix it.

I have the following in databaseName = 'lm' and using `def lmDB` in controller doesn't work.

Start with the MongoDB manual's low-level API section and the databaseName configuration described in the issue. Reproduce the controller's `def lmDB` lookup with `databaseName = 'lm'`, then determine whether the documented bean name is incorrect or the request-scoped bean is missing; done means either corrected documentation or a verified fix.

Written by the indexing model from the issue text.