Fix a problem with newly registered data sources.

When a new data source is registered after the plugin is 
initialized, it could not be used since its definition was 
never registered to the data source manager.
Change project stage to 'Production'.

- To optimize performance.
- To prevent "...may not be executed after a lifecycle 
request has been completed" error message.

 i.e.) Application.setStageManager()
Fix report saving problem with the latest BI-Server snapshot.