fix comments2

Author: kellyzly

external/kafka-0-10-sql/src/test/scala/org/apache/spark/sql/kafka010/KafkaTestUtils.scala

@@ -296,8 +296,9 @@ class KafkaTestUtils(withBrokerProps: Map[String, Object] = Map.empty) extends L
     props.put("replica.socket.timeout.ms", "1500")
     props.put("delete.topic.enable", "true")
     props.put("offsets.topic.num.partitions", "1")
-    // props.putAll(withBrokerProps.asJava)
-    withBrokerProps.foreach{ case (k, v) => props.put(k, v) }
+    // Can not use properties.putAll(propsMap.asJava) in scala-2.12
+    // See https://github.com/scala/bug/issues/10418
+    withBrokerProps.foreach { case (k, v) => props.put(k, v) }
     props
   }