Add RequireJS and RequireJS Optimizer configuration to the LMS

Respond to review comments:

- Rename build and config files for consistency between lms/studio.
- Fix merge conflicts with lms require config.
- Devstack uses optimized pipeline to skip require JS optimizer step
- Add tests for render_require_js_path_overrides

cms/lib/django_require/staticstorage.py

@@ -1,13 +0,0 @@
-"""
-:class:`~django_require.staticstorage.OptimizedCachedRequireJsStorage`
-"""
-
-from pipeline.storage import PipelineCachedStorage
-from require.storage import OptimizedFilesMixin
-
-
-class OptimizedCachedRequireJsStorage(OptimizedFilesMixin, PipelineCachedStorage):
-    """
-    Custom storage backend that is used by Django-require.
-    """
-    pass