Adding versions for infra related docker images

1. latest tag replaced by version number for vnc server
2. added specific version for own_nginx image
3. version control improved in ansible roles accordingly

Solves OOM-1766

Issue-ID: OOM-1767

Change-Id: I147c56b46a419188099d8ed3e78fed68810893e2
Signed-off-by: Tomáš Levora <t.levora@partner.samsung.com>
diff --git a/ansible/roles/dns/handlers/main.yml b/ansible/roles/dns/handlers/main.yml
index ac3209d..9d77893 100644
--- a/ansible/roles/dns/handlers/main.yml
+++ b/ansible/roles/dns/handlers/main.yml
@@ -1,8 +1,8 @@
 ---
-- name: Restart dnsmasq container
+- name: Restart dns server container
   docker_container:
-    name: dnsmasq
-    image: andyshinn/dnsmasq:2.76
+    name: dns-server
+    image: "{{ dns_server_image }}"
     command: -H /simulated_hosts --log-facility=-
     capabilities: NET_ADMIN
     volumes: