Finish organization testing routes

[bryanwong8]

Is your feature request related to a problem? Please describe.
We need to finish the testing routes for organizations

Describe the solution you'd like:
Create the testing routes for:

• update_organization
• delete_organization
• follow_organization
• unfollow_organization
• show_all_members_mods
• promote_member
• remove_member
• submit_article_for_review
• reviewed_article

Models
None

Schemas
None

API Routes
None

Endpoints	HTTP Method	Description	Tested

Create/Edit Functions

Edit the backend/tests/test_organizations.py file to make the test cases

• In the backend/conduit/organizations/views.py file make test functions for the following routes:
• You should reference the examples in backend/tests/test_articles.py, backend/tests/test_tags.py and other test files to help you create the test functions
• update_organization
• delete_organization
• show_all_members_mods

In the backend/tests/test_models.py file make the following test the Organization class functions:

• You should be creating a new class called OrganizationTest and should reference the other testing functions to help you create the test functions.
• add_moderator
• add_member
• remove_member
• update_slug
• is_member
• moderator
• promote
• request_review
• remove_review_status

Additional context