travis: fix GO111MODULE, import paths
travis: fix GO111MODULE, import paths

Signed-off-by: Gyuho Lee <0fbd30d364d71722b926950b451cecd97b54fc29@amazon.com>

ajityagaty/etcd,etcd-io/etcd,rnaveiras/etcd,mqliang/etcd,cockroachdb/etcd,ajityagaty/etcd,ajityagaty/etcd,li-ang/etcd,gyuho/etcd,coreos/etcd,coreos/etcd,mkumatag/etcd,rnaveiras/etcd,dannysauer/etcd,dannysauer/etcd,gyuho/etcd,etcd-io/etcd,li-ang/etcd,mqliang/etcd,mkumatag/etcd,rnaveiras/etcd,cockroachdb/etcd,mkumatag/etcd,etcd-io/etcd,mqliang/etcd