Also added the derective osPerms to check if the current user has permissions.
Removed old Django views and urls for user.
Created utils.views.APIView which should be used instead of the AjaxView.
Fixes: #1470Fixes: #1454
* seperate unittests and integration tests
* moved old tests in seperat folder 'old'
* created a testrunner that does not create a testdatabase, if only unittests are run
* wrote some unit- and integration tests as examples
* fixed user.get_short_name() to use the sort order from config
* fixed wrong url_pattern in the user app
