Grades: move out of temporary new folder

common/djangoapps/student/tests/tests.py

common/djangoapps/student/views.py

lms/djangoapps/ccx/views.py

...ps/certificates/management/commands/fix_ungraded_certs.py

lms/djangoapps/certificates/queue.py

lms/djangoapps/certificates/signals.py

lms/djangoapps/certificates/tests/test_signals.py

lms/djangoapps/courseware/tests/test_submitting_problems.py

lms/djangoapps/courseware/tests/test_views.py

lms/djangoapps/courseware/views/index.py

lms/djangoapps/courseware/views/views.py

lms/djangoapps/gating/tests/test_integration.py

lms/djangoapps/grades/api/views.py

lms/djangoapps/grades/course_data.py

lms/djangoapps/grades/course_grade.py

lms/djangoapps/grades/course_grade_factory.py

lms/djangoapps/grades/new/__init__.py

lms/djangoapps/grades/signals/handlers.py

lms/djangoapps/grades/subsection_grade.py

lms/djangoapps/grades/subsection_grade_factory.py