Etcd cluster setup makeover

The current way to setup the etc cluster is messy and buggy.

- It checks for cluster is healthy before the cluster is even created.
- The unit files are started on handlers, not in the task, so you mess with "flush handlers".
- The join_member.yml is not used.
- etcd events cluster is not configured for kubeadm
- remove duplicate runs between running the role on etcd nodes and k8s nodes

roles/etcd/tasks/refresh_config.yml

@@ -4,7 +4,7 @@
     src: etcd.env.j2
     dest: /etc/etcd.env
   notify: restart etcd
-  when: is_etcd_master
+  when: is_etcd_master and etcd_cluster_setup
 
 - name: Refresh config | Create etcd-events config file
   template: