This patch introduces an optional backend encryption for etcd service. Change-Id: Ia259f7844b868dbc418ace595c87eb1b278d3d38
Change-Id: If8351ab3000006323a05924e907f1e3745768304 Co-Authored-By: zhubingbing <zhubingbing10@gmail.com>> Partially-implements: bp kuryr-docker-plugin