WIP: Add ee dispatcher

Luke "Jared" Bennett requested to merge add-ee-dispatcher into master

What does this MR do?

CE port: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/11380

Add an ee dispatcher to limit ee conflicts when dealing with dispatcher

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

What are the relevant issue numbers?

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