[LOG4J2-3256] Reduce ignored package scope of KafkaAppender #640.
[LOG4J2-3256] Reduce ignored package scope of KafkaAppender #640.

Modified GitHub patch #640 from Lee
Dongjin/dongjinleekr/dongjin@apache.org.
apache/logging-log4j2,apache/logging-log4j2,apache/logging-log4j2