Improve Test Coverage for challengeHostTeamsCtrl.js (Current: 70.51%)

[Akshat453]

Description:

The file EvalAI/frontend/src/js/controllers/challengeHostTeamsCtrl.js.js currently has 70.51% test coverage (as per Codecov). To improve this, comprehensive unit tests need to be added targeting untested and partially covered functionality

[atheendre130505]

hey, I am interested in picking up this issue, Please assign this to me.