[#noissue] Fix apache dubbo plugin sniffer version
[#noissue] Fix apache dubbo plugin sniffer version

Apache Dubbo 2.6.x can run on java 6 and 7, only Apache Dubbo 2.7+ requires java 8

Xylus/pinpoint,jaehong-kim/pinpoint,koo-taejin/pinpoint,jaehong-kim/pinpoint,naver/pinpoint,naver/pinpoint,naver/pinpoint,suraj-raturi/pinpoint,barneykim/pinpoint,emeroad/pinpoint,suraj-raturi/pinpoint,koo-taejin/pinpoint,koo-taejin/pinpoint,barneykim/pinpoint,jaehong-kim/pinpoint,Xylus/pinpoint,minwoo-jung/pinpoint,Xylus/pinpoint,minwoo-jung/pinpoint,jaehong-kim/pinpoint,koo-taejin/pinpoint,naver/pinpoint,koo-taejin/pinpoint,emeroad/pinpoint,emeroad/pinpoint,Xylus/pinpoint,minwoo-jung/pinpoint,koo-taejin/pinpoint,Xylus/pinpoint,minwoo-jung/pinpoint,naver/pinpoint,Xylus/pinpoint,Xylus/pinpoint,barneykim/pinpoint,jaehong-kim/pinpoint,barneykim/pinpoint,minwoo-jung/pinpoint,suraj-raturi/pinpoint,barneykim/pinpoint,barneykim/pinpoint,emeroad/pinpoint,suraj-raturi/pinpoint,minwoo-jung/pinpoint,emeroad/pinpoint,suraj-raturi/pinpoint,suraj-raturi/pinpoint,emeroad/pinpoint,jaehong-kim/pinpoint,barneykim/pinpoint