Jackie-Jiang opened a new pull request #5082: Plug in the new routing 
introduced in #5046
URL: https://github.com/apache/incubator-pinot/pull/5082
 
 
   - Plug in the new routing for the new added routing features
   - Re-implement time boundary refresh as a general broker segment refresh to 
handle the update of time info, partition info etc.
   - Add PinotBrokerRouting resource to provide APIs to manage the broker 
routing
     - PUT `/routing/{tableName}`: Build/rebuild the routing for a table
     - PUT `/routing/refresh/{tableName}/{segmentName}`: Refresh the routing 
for a segment
     - DELETE `/routing/{tableName}`: Remove the routing for a table
   
   (Backward-incompatible) Broker rest API changes:
   - GET `/debug/timeBoundary/{tableName}` will return NOT_FOUND status when 
time boundary does not exist
   - GET `/debug/routingTable/{tableName}` will return the actual routing table 
instead of the snapshots because snapshot is no longer available for the new 
routing
   - GET `/health` will return the status from the ServiceStatus in order to 
reflect the real status of the broker
   
   (Backward-incompatible) Time boundary refresh:
   Time boundary refresh is merged into the general broker segment refresh and 
is triggered by the SegmentRefreshMessage.
   In case controller and broker are running in different versions, it won't 
have any effect.
   Since time boundary refresh is needed in very rare scenario, it should have 
very little impact.

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