Adding option for openssh to disable dns resolvings

Change-Id: I31a263ba044745fd16a3574bc83133b32f98b6a2
diff --git a/README.rst b/README.rst
index a3625c7..5a87430 100644
--- a/README.rst
+++ b/README.rst
@@ -17,6 +17,7 @@
     openssh:
       client:
         enabled: true
+        use_dns: False
         user:
           root:
             enabled: true
diff --git a/openssh/files/sshd_config b/openssh/files/sshd_config
index f1e5552..3e6ae5c 100755
--- a/openssh/files/sshd_config
+++ b/openssh/files/sshd_config
@@ -110,6 +110,9 @@
 {%- endif %}
 #GSSAPICleanupCredentials yes
 
+{%- if server.use_dns is defined %}
+UseDNS {{ server.use_dns }}
+{%- endif %}
 X11Forwarding {% if server.get('x11', {}).get('forwarding', True) %}yes{% else %}no{% endif %}
 X11DisplayOffset {{ server.get('x11', {}).get('display_offset', '10') }}
 PrintMotd {% if server.get('print_motd', False) %}yes{% else %}no{% endif %}
diff --git a/tests/pillar/openssh_server.sls b/tests/pillar/openssh_server.sls
index 070a5ae..6f321a7 100644
--- a/tests/pillar/openssh_server.sls
+++ b/tests/pillar/openssh_server.sls
@@ -1,11 +1,12 @@
 openssh:
   server:
     enabled: true
+    use_dns: False
     user:
       test:
         enabled: true
         name: test
-        user: 
+        user:
           enabled: true
           name: test
           sudo: true