Revert "[RELEASE] - pre tag commit:  '1.2.1-SNAPSHOT'."
Revert "[RELEASE] - pre tag commit:  '1.2.1-SNAPSHOT'."

This reverts commit 104c1c4e50962e9bb3ebb7d22c414f25f265ef97.

c3p0hz/zipkin,jfeltesse-mdsol/zipkin,betable/zipkin,c3p0hz/zipkin,rocwzp/zipkin,hydro2k/zipkin,c3p0hz/zipkin,jstanier/zipkin,wuqiangxjtu/zipkin,jstanier/zipkin,Yelp/zipkin,rjbhewei/zipkin,mt0803/zipkin,wuqiangxjtu/zipkin,mzagar/zipkin,mt0803/zipkin,prat0318/zipkin,srijs/zipkin,hydro2k/zipkin,xujianhai/zipkin,prat0318/zipkin,rocwzp/zipkin,wuqiangxjtu/zipkin,mt0803/zipkin,Yelp/zipkin,jstanier/zipkin,jamescway/zipkin,mzagar/zipkin,betable/zipkin,lqjack/zipkin,xujianhai/zipkin,hydro2k/zipkin,prat0318/zipkin,thelastpickle/zipkin,mzagar/zipkin,jamescway/zipkin,Yelp/zipkin,hydro2k/zipkin,coursera/zipkin,jfeltesse-mdsol/zipkin,srijs/zipkin,gneokleo/zipkin,c3p0hz/zipkin,gneokleo/zipkin,betable/zipkin,betable/zipkin,thelastpickle/zipkin,jstanier/zipkin,xujianhai/zipkin,yshaojie/zipkin,xujianhai/zipkin,jfeltesse-mdsol/zipkin,thelastpickle/zipkin,mt0803/zipkin,rjbhewei/zipkin,gneokleo/zipkin,yshaojie/zipkin,Yelp/zipkin,yshaojie/zipkin,lqjack/zipkin,jamescway/zipkin,rocwzp/zipkin,jamescway/zipkin,thelastpickle/zipkin,coursera/zipkin,rocwzp/zipkin,rjbhewei/zipkin,coursera/zipkin,wuqiangxjtu/zipkin,srijs/zipkin,rjbhewei/zipkin,coursera/zipkin,jfeltesse-mdsol/zipkin,mzagar/zipkin,lqjack/zipkin,lqjack/zipkin,yshaojie/zipkin,gneokleo/zipkin,srijs/zipkin,prat0318/zipkin