CAS-1425: aligned view names to match the jsp filename

Some view names in default_views.properties have been updated to match the file names of the jsp's. The respective view names in the login-webflow.xml have been updated as well. 
Well, it's two lines... And the view is not technically part of the public facing ui. It's in `monitoring` and not `default/ui`
```
viewStatisticsView.(class)=org.springframework.web.servlet.view.JstlView
viewStatisticsView.url=/WEB-INF/view/jsp/monitoring/viewStatistics.jsp
```

Would you recommend it going somewhere else?