Move set_facts to kubespray-defaults defaults

These facts can be generated in defaults with a performance
boost.

Also cleaned up duplicate etcd var names.

roles/kubernetes/master/templates/kubeadm-config.yaml.j2

@@ -5,7 +5,7 @@ api:
   bindPort: {{ kube_apiserver_port }}
 etcd:
   endpoints:
-{% for endpoint in etcd_access_endpoint.split(',') %}
+{% for endpoint in etcd_access_addresses.split(',') %}
   - {{ endpoint }}
 {% endfor %}
   caFile: {{ kube_config_dir }}/ssl/etcd/ca.pem