mvcc: test keys gauge is reloaded correctly on restore
mvcc: test keys gauge is reloaded correctly on restore

ajityagaty/etcd,lorneli/etcd,coreos/etcd,mqliang/etcd,vimalk78/etcd,akauppi/etcd,cockroachdb/etcd,heyitsanthony/etcd,lorneli/etcd,YuleiXiao/etcd,joshix/etcd,xiang90/etcd,glevand/coreos--etcd,mkumatag/etcd,bdarnell/etcd,glevand/coreos--etcd,sinsharat/etcd,etcd-io/etcd,visheshnp/etcd,dannysauer/etcd,mickep76/etcd,coreos/etcd,fanminshi/etcd,akauppi/etcd,etcd-io/etcd,fanminshi/etcd,whuwxl/etcd,mkumatag/etcd,joshix/etcd,bluebreezecf/etcd,rnaveiras/etcd,sinsharat/etcd,gyuho/etcd,li-ang/etcd,gyuho/etcd,xiang90/etcd,mickep76/etcd,cockroachdb/etcd,YuleiXiao/etcd,bluebreezecf/etcd,a-robinson/etcd,visheshnp/etcd,sebrandon1/etcd,li-ang/etcd,mqliang/etcd,mqliang/etcd,ajityagaty/etcd,sebrandon1/etcd,bdarnell/etcd,ajityagaty/etcd,a-robinson/etcd,rnaveiras/etcd,vimalk78/etcd,etcd-io/etcd,mkumatag/etcd,heyitsanthony/etcd,whuwxl/etcd,rnaveiras/etcd,dannysauer/etcd