Celery: increase timeout limit for sync_remote_repositories task

[humitos]

Users belonging to huge GH organizations, like conda-forge, were never syncing
their repositories because the task timed out and none of the relationships were
created.

[humitos]

We are 100% sure we have a problem with conda-forge, so we could hardcode this name and skip it from the re-sync as next step if we want. Nobody is importing conda-forge repositories into Read the Docs and I don't think it makes sense at all.

Also, showing this repositories in the UI is currently distracting to users. This will be solved in the ext-theme because we will be allowing filtering, tho.

[agjohnson]

we could hardcode this name and skip it from the re-sync as next step if we want

This sounds like a great idea. If we felt it was necessary to show the conda-forge organization in the import page, we might just want to skip tracking repositories in the conda forge organization (still keeping the conda-forge organization relationship to the github connected user). We could at least show this organization in a disabled and skipped state.

[agjohnson]

This is a good fix as a temporary solution 👍 We should follow up to this and skip tracking conda-forge repos at all though -- agreed it doesn't make sense to show these.