kafka replication factor should depend on list of database nodes

Earlier zookeeper node list was same as database node list but it was changed
recently to be same as cfgm nodes. As a result, replication factor was getting
set wrongly if cfgm and database nodes are not same.
Closes-Bug: #1634397

Change-Id: Ib33dd446b18aee5174b7199d87a005bcaa533513
(cherry picked from commit 9127d0b)

contrail_provisioning/database/setup.py

@@ -175,7 +175,7 @@ def fixup_kafka_server_properties(self, listen_ip):
             local('sudo echo "delete.topic.enable=true" >> %s' % KAFKA_SERVER_PROPERTIES)
 
         #Set replication factor to 2 if more than one kafka broker is available
-        if (len(zk_list)>1):
+        if (len(self._args.seed_list) > 1 or len(self._args.seed_list[0].split(','))>1):
             if not self.file_pattern_check(KAFKA_SERVER_PROPERTIES, 'default.replication.factor'):
                 local('sudo echo "default.replication.factor=2" >> %s' % (KAFKA_SERVER_PROPERTIES))
         KAFKA_LOG4J_PROPERTIES='/usr/share/kafka/config/log4j.properties'