Keeps internal listener first in protocol map, as ...

documented in
https://cwiki.apache.org/confluence/display/KAFKA/KIP-103%3A+Separation+of+Internal+and+External+traffic#KIP-103:SeparationofInternalandExternaltraffic-Compatibility,Deprecation,andMigrationPlan

"ZooKeeper-based consumers will use the first listener with PLAINTEXT as the security protocol, so listener ordering is important in such cases."

Confirmed this using kafka-manager (#83)

Author: solsson

10broker-config.yml

@@ -81,7 +81,7 @@ data:
 
     # Maps listener names to security protocols, the default is for them to be the same. See the config documentation for more details
     #listener.security.protocol.map=PLAINTEXT:PLAINTEXT,SSL:SSL,SASL_PLAINTEXT:SASL_PLAINTEXT,SASL_SSL:SASL_SSL
-    listener.security.protocol.map=OUTSIDE:PLAINTEXT,PLAINTEXT:PLAINTEXT,SSL:SSL,SASL_PLAINTEXT:SASL_PLAINTEXT,SASL_SSL:SASL_SSL
+    listener.security.protocol.map=PLAINTEXT:PLAINTEXT,SSL:SSL,SASL_PLAINTEXT:SASL_PLAINTEXT,SASL_SSL:SASL_SSL,OUTSIDE:PLAINTEXT
     inter.broker.listener.name=PLAINTEXT
 
     # The number of threads that the server uses for receiving requests from the network and sending responses to the network