update plugin test doc. (#3804)
update plugin test doc. (#3804)


apache/skywalking,ascrutae/sky-walking,apache/skywalking,OpenSkywalking/skywalking,OpenSkywalking/skywalking,apache/skywalking,ascrutae/sky-walking,apache/skywalking,ascrutae/sky-walking,apache/skywalking,apache/skywalking,apache/skywalking,ascrutae/sky-walking