Add tests for DisbandTeamAPIView

[Oksamies]

[!WARNING] This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite. Learn more

• #942 👈
• #941 : 1 other dependent PR (#1047 )
• #939 : 1 other dependent PR (#940 )
• #945 : 1 other dependent PR (#946 )
• #943 : 1 other dependent PR (#944 )
• #937 : 1 other dependent PR (#938 )
• #934 : 1 other dependent PR (#935 )
• #1024
• #1025
• #1023
• #1044
• #1043
• master

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

:exclamation: No coverage uploaded for pull request base (12-11-Add_DisbandTeamAPIView@6049fba). Click here to learn what that means.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## 12-11-Add_DisbandTeamAPIView #942 +/- ## =============================================================== Coverage ? 92.62% =============================================================== Files ? 278 Lines ? 8293 Branches ? 777 =============================================================== Hits ? 7681 Misses ? 506 Partials ? 106 ```

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