title: Spring cloud gateway priority when pool consumed
body: <p>is it possible to make a pool for requests incomming form clients per API? OR make a priorities in the filters?
  Becasue I have some critical API method (service behind GW), which MUST any time work.
  Next to it is a big data service - I affrad, that when whole pool will be taken to big data, tehn the core service will be not reachable.
  How to achieve this?</p>
  <p>Thanks a lot.</p>