[MM-36742] Fix immediately expiring request context

[hanzei]

Summary

The caller of createContext needs to cancel it instead of createContext itself.

Ticket Link

https://mattermost.atlassian.net/browse/MM-36742
Fixes #451

[mickmister]

@hanzei Does this need QA review? What would be tested?

[hanzei]

@DHaussermann Could you please test if the RHS infos get correctly loaded and picking an repo in the create issue modal works?

[DHaussermann]

@hanzei This resolves the list of repos not loading and it is now possible to create and attach.
However I still see a remaining issue. The list of assignees is still not populating and I get 500 responses still for this.


I have reproduced this on multiple public and private repos. Is this solution maybe incomplete or would this require a saparate PR?

[hanzei]

@DHaussermann Good catch. Fixed that in 93a453e. Please take another look.

[DHaussermann]

Tested and passed.

• Issue with 500 responses for assignee and Repo are resolved
• Tested on desktop and browser
• Tested for create and attach
• Tested on public and private repos

LGTM!

Huge thanks @hanzei! Please merge, this will unblock 2 other PRs waiting for testing.