Fix etcd-python client installation
Fix etcd-python client installation

Install the etcd-python client with sudo

Change-Id: I33b94d3fa9031afc76321c7176dfd23e91546c22

openstack/dragonflow,FrankDuan/df_code,FrankDuan/df_code,neoareslinux/dragonflow,neoareslinux/dragonflow,openstack/dragonflow,FrankDuan/df_code,openstack/dragonflow