For microsites, since we don't have a footer override yet for django templates, remove the footer all together
Merge pull request #5260 from edx/cdodge/remove-edx-footer-for-microsites

For microsites, since we don't have a footer override yet for django tem...
do the ORG filtering as part of the mongo query. Also, don't trigger metadata inheritence calculations when just trying to load 'about' information, which is not tied into the course tree anyhow (i.e. no parent/child relationship)

Some code cleanup regarding eligibility to apply inherited metadata