Add Support for True Multi-tenancy

[clintonb]

We currently use the same OAuth credentials for all tenants on our IDAs. This works because the auth service (LMS) is not truly multi-tenant. Just because LMS is not truly multi-tenant doesn't mean our IDAs cannot be.

Most of the IDAs use the Django sites framework coupled with a custom model (e.g. SiteConfiguration). We should properly codify this implementation in https://github.com/edx/edx-django-extensions. Once that is done, we can create a new strategy that is multi-tenant-aware.

If we ever get to the point of separating users, we should explore a new storage backend as well as discussed in omab/python-social-auth#552.

[jadavbheda]

This request seems to be created a while ago. I wonder if community has anything already build or started efforts to build truly multi-tenant. If there is any we would love to contribute. Any pointers would be appreciated.

[ilavenilp]

+1

[k2glyph]

+1