Fixed a bug where Course Discovery could not push organization updates to LMS/Studio if the organization already existed there but was inactive.
Specific changes to the `v0/organizations` API:
1. Any organization may be updated via the PUT method, regardless of whether or not it is active.
2. Upon being updated, the organization is marked as active, whether it was previously active, inactive, or non-existent.
3. The 'active' field may not be set or updated via the HTTP API, because that would be in conflict with change 2.
See https://github.com/edx/edx-organizations/pull/165 for details.