1.1.3dev: All workflow parsing occurs in `parse_workflow_config`. Refs #2045.

Previously some workflow attributes were parsed in methods of the `ConfigurableTicketWorkflow` class.


git-svn-id: http://trac.edgewall.org/intertrac/log:/trunk@13322 af82e41b-90c4-0310-8c96-b1721e28e2e2