pkg/pbutil: add marshal-related tests
pkg/pbutil: add marshal-related tests

qqsun8819/etcd,etcd-io/etcd,es-chow/etcd,jeremyeder/etcd,mickep76/etcd,chipironcin/etcd,xebitstudios/etcd,glycerine/etcd,csuideal/etcd,njucslqq/etcd,ecnahc515/etcd,ajityagaty/etcd,insionng/etcd,sebrandon1/etcd,jonboulle/etcd,fgbreel/etcd,beni55/etcd,gosharplite/etcd,olark/etcd,chenbaihu/etcd,rnaveiras/etcd,xiang90/etcd,jeremyeder/etcd,whuwxl/etcd,vimalk78/etcd,cockroachdb/etcd,shawnps/etcd,offscale/etcd,gouyang/etcd,fanminshi/etcd,dnaeon/etcd,mkumatag/etcd,swingbach/etcd,mischief/etcd,msanterre/etcd,yifan-gu/etcd,qiaochao911/etcd,axingblog/etcd,hongbinz/etcd,rchicoli/etcd,mwitkow/etcd,CrazyJvm/etcd,giantswarm/etcd,bdarnell/etcd,raoofm/etcd,xebitstudios/etcd,ktateish/etcd,tempbottle/etcd,yudai/etcd,njucslqq/etcd,princeqjzh/etcd,shakefu/etcd,axingblog/etcd,dannysauer/etcd,glevand/coreos--etcd,mqliang/etcd,sinsharat/etcd,snailwalker/etcd,junxu/etcd,gosharplite/etcd,wfxiang08/etcd,pauldallen/etcd,arthurcolle/etcd,visheshnp/etcd,youxidev/etcd,insequent/etcd,akauppi/etcd,junxu/etcd,purpleidea/etcd,pauldallen/etcd,hongchaodeng/etcd,jlamillan/etcd,YuleiXiao/etcd,pengzj/etcd,lzbgt/etcd,onlyjob/etcd,shafreeck/etcd,chenbaihu/etcd,akauppi/etcd,devfreesg/etcd,csuideal/etcd,delkyd/etcd,Eagle-X/etcd,crandles/etcd,gityf/etcd,westhood/etcd,mkumatag/etcd,glensc/etcd,etcd-io/etcd,mwitkow-io/etcd,mgoelzer/etcd-fork2,Timer/etcd,rchicoli/etcd,qqsun8819/etcd,sebschrader/etcd,njharman/etcd,fanminshi/etcd,betawaffle/etcd,SivagnanamCiena/etcd,hroyrh/etcd,linuxcer/etcd,achanda/etcd,HideoYamauchi/etcd,joshix/etcd,buaazp/etcd,es-chow/etcd,mgoelzer/etcd-fork2,nkhare/etcd,hroyrh/etcd,sinsharat/etcd,kingland/etcd,imzhulei/etcd,purpleidea/etcd,sofuture/etcd,ktateish/etcd,siddontang/etcd,visheshnp/etcd,hongchaodeng/etcd,mike-lerch/etcd,siddontang/etcd,tguangch/etcd,StorReduce/etcd,Timer/etcd,linuxcer/etcd,mqliang/etcd,openedbox/etcd,ajityagaty/etcd,hzy001/etcd,jravetch/etcd,jonboulle/etcd,rnaveiras/etcd,svdata/etcd,handsomesun/etcd,etcd-io/etcd,glensc/etcd,QuantiumTechnology/etcd,crandles/etcd,li-ang/etcd,steveeJ/etcd,wowsoso/etcd,ylong/etcd,giantswarm/etcd,Winslett/etcd,luxas/etcd,Yhgenomics/etcd,elimisteve/etcd,youxidev/etcd,Winslett/etcd,kingland/etcd,plasticbox/etcd,insionng/etcd,wfxiang08/etcd,luxas/etcd,zaphod-concur/etcd,TheHippo/etcd,jmptrader/etcd,sayden/etcd,snailwalker/etcd,rnaveiras/etcd,honeyqa/etcd,ylong/etcd,wantonsolutions/dinv-etcd,bakins/etcd,buaazp/etcd,xychu/etcd,xueshanf/etcd,heyitsanthony/etcd,wantonsolutions/dinv-etcd,delkyd/etcd,bspline/etcd,xychu/etcd,ecnahc515/etcd,xdlinear/etcd,openedbox/etcd,beni55/etcd,jlamillan/etcd,bakins/etcd,oscarrr110/etcd,hpcloud/etcd,gae123/etcd,shawnps/etcd,Eagle-X/etcd,combk8s/etcd,mwitkow-io/etcd,justintung/etcd,tangkun75/etcd,joshix/etcd,onlyjob/etcd,StorReduce/etcd,lorneli/etcd,barakmich/etcd,glycerine/etcd,fasaxc/etcd,whuwxl/etcd,shakefu/etcd,nieanan/etcd,asim/etcd,CrazyJvm/etcd,polvi/etcd,plasticbox/etcd,sebrandon1/etcd,tamird/etcd,hpcloud/etcd,ajityagaty/etcd,gityf/etcd,combk8s/etcd,xiang90/etcd,a-robinson/etcd,gtank/etcd,princeqjzh/etcd,polvi/etcd,elimisteve/etcd,Yhgenomics/etcd,jravetch/etcd,cognusion/etcd,gyuho/etcd,coreos/etcd,jefby/etcd,yudai/etcd,nekto0n/etcd,QuantiumTechnology/etcd,jchauncey/etcd,barakmich/etcd,oscarrr110/etcd,jmptrader/etcd,mkumatag/etcd,gtank/etcd,justintung/etcd,betawaffle/etcd,njharman/etcd,dalanlan/etcd,nieanan/etcd,a-robinson/etcd,tguangch/etcd,mike-lerch/etcd,ravigadde/etcd,improbable-io/etcd,mitake/etcd,jefby/etcd,nekto0n/etcd,HideoYamauchi/etcd,armstrongli/etcd,hongbinz/etcd,endocode/etcd,pengzj/etcd,dalanlan/etcd,gae123/etcd,kkaneda/etcd,lumjjb/etcd,glevand/coreos--etcd,vimalk78/etcd,steveeJ/etcd,nkhare/etcd,asim/etcd,qiaochao911/etcd,wowsoso/etcd,offscale/etcd,xueshanf/etcd,hzy001/etcd,TheHippo/etcd,yyljlyy/etcd,yifan-gu/etcd,lumjjb/etcd,honeyqa/etcd,bluebreezecf/etcd,iamqizhao/etcd,spacejam/etcd,olark/etcd,achanda/etcd,gouyang/etcd,endocode/etcd,mickep76/etcd,mitake/etcd,heyitsanthony/etcd,lzbgt/etcd,shafreeck/etcd,msanterre/etcd,devfreesg/etcd,coreos/etcd,cchamplin/etcd,imzhulei/etcd,dnaeon/etcd,fgbreel/etcd,westhood/etcd,svdata/etcd,yyljlyy/etcd,gyuho/etcd,bluebreezecf/etcd,mqliang/etcd,OyTao/etcd_learning,bspline/etcd,fasaxc/etcd,sofuture/etcd,armstrongli/etcd,freeloop1114/etcd,wantonsolutions/dinv-etcd,zaphod-concur/etcd,mwitkow/etcd,SivagnanamCiena/etcd,handsomesun/etcd,xdlinear/etcd,li-ang/etcd,fasaxc/etcd,chipironcin/etcd,tempbottle/etcd,cockroachdb/etcd,arthurcolle/etcd,yichengq/etcd,raoofm/etcd,cchamplin/etcd,yichengq/etcd,improbable-io/etcd,sayden/etcd,ravigadde/etcd,YuleiXiao/etcd,jchauncey/etcd,sebschrader/etcd,OyTao/etcd_learning,insequent/etcd,kkaneda/etcd,swingbach/etcd,spacejam/etcd,lorneli/etcd,freeloop1114/etcd,cognusion/etcd,tangkun75/etcd,tamird/etcd,iamqizhao/etcd,dannysauer/etcd,bdarnell/etcd,mischief/etcd