1.1.3dev: Follow-on to [13455]. Refs #11859.

Use `global_databasemanager` rather than instantiating a new `DatabaseManager` instance.


git-svn-id: http://trac.edgewall.org/intertrac/log:/trunk@13574 af82e41b-90c4-0310-8c96-b1721e28e2e2