Add view tests

• Introduce framework to simply test correct rendering of views
• Create tests for dashboard views
• Create tests for plan views
• Create tests for default admin views (add and change) of AKModel models
• Create tests for scheduling (admin) views
• Create tests for submission views
• Improve pipeline to correctly run the new tests on a blank database with fixture loading
• Add coverage reporting
• Show test results in GitLab directly

AKPlanning/settings_ci.py

@@ -24,3 +24,6 @@ DATABASES = {
         },
     }
 }
+
+TEST_RUNNER = 'xmlrunner.extra.djangotestrunner.XMLTestRunner'
+TEST_OUTPUT_FILE_NAME = 'unit.xml'