smart/aws: add 10s timeout for dns provider

handles errors where dns server may take a moment
to serve the new record

app/terraform/proxy/cloudfront.py

@@ -53,6 +53,7 @@ class ProxyCloudfrontAutomation(ProxyAutomation):
         key_name      = local.rfc2136_tsig_key
         key_secret    = local.rfc2136_tsig_secret
         key_algorithm = "hmac-sha512"
+        timeout       = "10s"
       }
     }