Fix DNS entries in etcd's openssl.conf by adding a newline. (#2208)

DNS entries generated from 'etcd_cert_alt_names' variable in etcd's
openssl.conf are not terminated by a newline.

This fixes issue #2207.

roles/etcd/templates/openssl.conf.j2

@@ -32,9 +32,9 @@ DNS.{{ 1 + loop.index }} = {{ host }}
 DNS.{{ idx | string }} = {{ apiserver_loadbalancer_domain_name }}
 {% endif %}
 {% set idx =  groups['etcd'] | length | int + 3 %}
-{%- for etcd_alt_name in etcd_cert_alt_names -%}
+{% for etcd_alt_name in etcd_cert_alt_names %}
 DNS.{{ idx + 1 + loop.index }} = {{ etcd_alt_name }}
-{%- endfor -%}
+{% endfor %}
 {% for host in groups['etcd'] %}
 IP.{{ 2 * loop.index - 1 }} = {{ hostvars[host]['access_ip'] | default(hostvars[host]['ansible_default_ipv4']['address']) }}
 IP.{{ 2 * loop.index }} = {{ hostvars[host]['ip'] | default(hostvars[host]['ansible_default_ipv4']['address']) }}