Directly skip messages whose routingKey/schedulerId is not linked to mozilla-central or try

[marco-c]

We can avoid listing the task group for those, saving some resources.

[La0]

So we would only listen to gecko-level-X where X is 1,2,3 ?

[marco-c]

Yep! I think we can't directly register only for those (but maybe I'm wrong) but we can definitely skip any pulse message that does not belong to those.