adjust department names

[gumaerc]

What are the relevant tickets?

Closes https://github.com/mitodl/hq/issues/4838

Description (What does it do?)

This PR updates 4 department names as noted in the above issue. update_date and created_date info was also stripped from the JSON fixtures, as it's irrelevant and confuses the update_or_create function that the info is passed to. The utility functions that load this data were previously matching their update_or_create calls based on the name property of the school or department, which is incorrect. They should instead be matching on their ID columns; department_id for departments and id for schools. This ensures that you can update the name and not get integrity errors like django.db.utils.IntegrityError: duplicate key value violates unique constraint "learning_resources_learningresourcedepartmentnew_pkey". Another issue here was the backpopulate_resource_channels command, which runs update_or_create based on a slugified version of the department name for departments. Since the name is changing here, if the command was run as-is a new channel would be created instead of updating the existing one. This was changed to update channel based on search_filter, since it is based on department_id which is actually constant.

How can this be tested?

• Spin up mit-open on this branch
• Run docker compose exec web ./manage.py update_departments_schools
• Run docker compose exec web ./manage.py backpopulate_resource_channels --department --overwrite
• Visit http://localhost:8062/departments
• Ensure that the changed department names are listed and match what they should be as indicated in the above issue
• Click on the changed departments and ensure that they lead to a channel page, and that the channel page has been updated with the new department name

[mbertrand]

Remove this line or there will be channels for both the old and new name

Might be good to add a unit test for this condition too (update an existing channel with different name)

[mbertrand]

👍