Allow etcd_access_addresses to be more flexible

The variale etcd_access_addresses is used to determine
how to address communication from other roles to
the etcd cluster.

It was set to the address that ansible uses to
connect to instance ({{ item }})s and not the
the variable:
  ip_access
which had already been created and could already
be overridden through the access_ip variable.

This change allows ansible to connect to a machine using
a different address than the one used to access etcd.

roles/kubernetes/preinstall/tasks/set_facts.yml

@@ -30,7 +30,7 @@
 - set_fact:
     etcd_access_addresses: |-
       {% for item in groups['etcd'] -%}
-        https://{{ item }}:2379{% if not loop.last %},{% endif %}
+        https://{{ hostvars[item]['access_ip'] | default(hostvars[item]['ip'] | default(hostvars[item]['ansible_default_ipv4']['address'])) }}:2379{% if not loop.last %},{% endif %}
       {%- endfor %}
 - set_fact: etcd_access_endpoint="{% if etcd_multiaccess %}{{ etcd_access_addresses }}{% else %}{{ etcd_endpoint }}{% endif %}"
 - set_fact: