Replace DNS server to CZ

Change-Id: If57ce99f0d059a968cf84858363c46f86a0ae0f9
diff --git a/tcp_tests/templates/ironic_standalone/underlay--user-data-ironic.yaml b/tcp_tests/templates/ironic_standalone/underlay--user-data-ironic.yaml
index e2b63dd..e137cab 100644
--- a/tcp_tests/templates/ironic_standalone/underlay--user-data-ironic.yaml
+++ b/tcp_tests/templates/ironic_standalone/underlay--user-data-ironic.yaml
@@ -47,7 +47,7 @@
    #- sleep 120
    - echo "Preparing base OS"
 
-   - echo "nameserver 172.18.208.44" >> /etc/resolv.conf;
+   - echo "nameserver 172.18.176.6" >> /etc/resolv.conf;
    - apt-get update
    - which wget >/dev/null || (apt-get update; apt-get install -y wget);
    - apt-get install -y ntp