Improve API test coverage

[cmd-ntrf]

Name                                                      Stmts   Miss  Cover
-----------------------------------------------------------------------------
mchub/resources/api_view.py                                  61      7    89%   85-91, 116
mchub/resources/available_resources_api.py                   23     15    35%   13-37
mchub/resources/magic_castle_api.py                          50      4    92%   30, 36, 41, 55
mchub/resources/progress_api.py                              17      0   100%
mchub/resources/project_api.py                               77     41    47%   15-30, 44, 49-50, 54-55, 74-107, 112, 114, 118
mchub/resources/template_api.py                               6      1    83%   8
mchub/resources/user_api.py                                   5      0   100%

Missing tests:

• mchub/resources/api_view.py
  • test accessing the interface with a local user not already in the database
  • TokenSuperUser
• mchub/resources/available_resources_api.py
  • with hostname
    • project now shared with user -> cluster exception
    • test with cluster + project owned by user
  • with cloud id
    • test project own by user
    • test invalid project id -> empty return
    • test project not shared with user -> empty return
  • without hostname and cloud id
    • empty return
• mchub/resources/magic_castle_api.py
  • test post with invalid project
  • test post-apply without data
  • test post-apply on invalid project or project not owned by user
  • test put without data
• mchub/resources/project_api.py
  • test GET with project id
  • test GET with project id not owned by user
  • test POST without data
  • test POST without all required fields in DATA
  • test POST with missing environment variables
  • test PATCH
    • add user to a project
    • remove user from a project
    • add user to an invalid project
    • edit project when not admin
  • test DELETE
    • project not owned or invalid id
    • project with active clusters
• mchub/resources/template_api.py
  • test getting default Magic Castle template