etcd directly in host

fix etcd configuration for nodes

fix wrong calico checksums

using a var name etcd_bin_dir

fix etcd handlers for sysvinit

using a var name etcd_bin_dir

sysvinit script

review etcd configuration

roles/etcd/defaults/main.yml

@@ -0,0 +1,3 @@
+---
+etcd_version: v2.2.4
+etcd_bin_dir: "{{ local_release_dir }}/etcd/etcd-{{ etcd_version }}-linux-amd64/"