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/install_docker.yml

@@ -9,22 +9,22 @@
   retries: 4
   delay: "{{ retry_stagger | random + 3 }}"
   changed_when: false
+  when: etcd_cluster_setup
 
 - name: Install etcd launch script
   template:
     src: etcd.j2
     dest: "{{ bin_dir }}/etcd"
     owner: 'root'
-    mode: 0755
+    mode: 0750
     backup: yes
-  notify: restart etcd
+  when: etcd_cluster_setup
 
 - name: Install etcd-events launch script
   template:
     src: etcd-events.j2
     dest: "{{ bin_dir }}/etcd-events"
     owner: 'root'
-    mode: 0755
+    mode: 0750
     backup: yes
   when: etcd_events_cluster_setup
-  notify: restart etcd-events