proxy: add a test for configHandler
proxy: add a test for configHandler

StorReduce/etcd,rnaveiras/etcd,asim/etcd,tamird/etcd,zaphod-concur/etcd,jchauncey/etcd,asim/etcd,luxas/etcd,combk8s/etcd,whuwxl/etcd,fasaxc/etcd,dnaeon/etcd,OyTao/etcd_learning,ajityagaty/etcd,visheshnp/etcd,jonboulle/etcd,beni55/etcd,a-robinson/etcd,jlamillan/etcd,xiang90/etcd,qqsun8819/etcd,gouyang/etcd,yichengq/etcd,tguangch/etcd,li-ang/etcd,sayden/etcd,wantonsolutions/dinv-etcd,sebrandon1/etcd,improbable-io/etcd,mkumatag/etcd,heyitsanthony/etcd,bdarnell/etcd,chipironcin/etcd,sebrandon1/etcd,gouyang/etcd,armstrongli/etcd,coreos/etcd,msanterre/etcd,akauppi/etcd,linuxcer/etcd,YuleiXiao/etcd,yichengq/etcd,ajityagaty/etcd,sayden/etcd,lumjjb/etcd,mike-lerch/etcd,jeremyeder/etcd,whuwxl/etcd,xiang90/etcd,handsomesun/etcd,yudai/etcd,raoofm/etcd,HideoYamauchi/etcd,dnaeon/etcd,lorneli/etcd,msanterre/etcd,nekto0n/etcd,rnaveiras/etcd,mickep76/etcd,glycerine/etcd,joshix/etcd,jchauncey/etcd,glycerine/etcd,lorneli/etcd,insequent/etcd,mkumatag/etcd,wantonsolutions/dinv-etcd,kkaneda/etcd,purpleidea/etcd,westhood/etcd,glevand/coreos--etcd,rchicoli/etcd,jonboulle/etcd,plasticbox/etcd,li-ang/etcd,bluebreezecf/etcd,hroyrh/etcd,wowsoso/etcd,hroyrh/etcd,cockroachdb/etcd,Eagle-X/etcd,Timer/etcd,fasaxc/etcd,a-robinson/etcd,xychu/etcd,Timer/etcd,zaphod-concur/etcd,CrazyJvm/etcd,combk8s/etcd,hongbinz/etcd,shawnps/etcd,pauldallen/etcd,hongbinz/etcd,mqliang/etcd,oscarrr110/etcd,sofuture/etcd,vimalk78/etcd,yudai/etcd,swingbach/etcd,ktateish/etcd,mqliang/etcd,cockroachdb/etcd,mike-lerch/etcd,achanda/etcd,westhood/etcd,nekto0n/etcd,akauppi/etcd,fanminshi/etcd,mickep76/etcd,Eagle-X/etcd,purpleidea/etcd,TheHippo/etcd,tamird/etcd,etcd-io/etcd,insequent/etcd,CrazyJvm/etcd,qqsun8819/etcd,chipironcin/etcd,pauldallen/etcd,visheshnp/etcd,gyuho/etcd,heyitsanthony/etcd,shawnps/etcd,wantonsolutions/dinv-etcd,StorReduce/etcd,ravigadde/etcd,mqliang/etcd,jlamillan/etcd,endocode/etcd,sinsharat/etcd,achanda/etcd,OyTao/etcd_learning,beni55/etcd,vimalk78/etcd,fasaxc/etcd,linuxcer/etcd,bluebreezecf/etcd,fanminshi/etcd,glevand/coreos--etcd,plasticbox/etcd,cchamplin/etcd,raoofm/etcd,TheHippo/etcd,ajityagaty/etcd,tguangch/etcd,sinsharat/etcd,oscarrr110/etcd,coreos/etcd,xychu/etcd,endocode/etcd,handsomesun/etcd,sofuture/etcd,etcd-io/etcd,lumjjb/etcd,hongchaodeng/etcd,luxas/etcd,kkaneda/etcd,dannysauer/etcd,siddontang/etcd,etcd-io/etcd,YuleiXiao/etcd,HideoYamauchi/etcd,armstrongli/etcd,jeremyeder/etcd,rnaveiras/etcd,improbable-io/etcd,ravigadde/etcd,ktateish/etcd,bdarnell/etcd,gyuho/etcd,dannysauer/etcd,swingbach/etcd,wowsoso/etcd,mkumatag/etcd,siddontang/etcd,joshix/etcd,rchicoli/etcd,hongchaodeng/etcd,cchamplin/etcd