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/defaults/main.yml

@@ -1,6 +1,7 @@
 ---
 # Set to false to only do certificate management
 etcd_cluster_setup: true
+etcd_events_cluster_setup: false
 
 etcd_backup_prefix: "/var/backups"
 etcd_data_dir: "/var/lib/etcd"