Adds Feature Flag for Swarming tasks

[IvanBM18]

Adds a Feature flag so that we are able to control wether tasks in swarming will be able to be triggered or not trough an external value.

[javanlacerda]

Could you provide evidence that it's working in dev? As dev is not sync with master, you will probably need to have a commit that combines your implementation with this fix, and then cherry-pick it over dev.

[IvanBM18]

Could you provide evidence that it's working in dev? As dev is not sync with master, you will probably need to have a commit that combines your implementation with this fix, and then cherry-pick it over dev.

Added some logs to dev env And here's a screenshot of some logs of tasks in dev that show the feature flag as false:

[letitz]

LGTM but you need a test :)

[javanlacerda]

You need to test the entire implementation that regards swarming tasks with feature flag in dev and then provide evidence that even with the new code, we don't have any new error group.

[IvanBM18]

Closing this one since we are doing a full rollback on the swarming changes ill send it back again later when we are sure the changes are healthy and ready

[jardondiego]

Closing this one since we are doing a full rollback on the swarming changes ill send it back again later when we are sure the changes are healthy and ready.

I think it would make sense to keep this to help protect future releases. I think we should re-open it.