Fix tests

* replace service to systemctl call for sync time
* Add forward policy accept after docker install
due to https://github.com/moby/moby/pull/28257 break gtw node

Change-Id: I790bc9c1b2f203119d4142ec25956634bf6bb94f
diff --git a/tcp_tests/templates/virtual-offline-pike-ovs/openstack.yaml b/tcp_tests/templates/virtual-offline-pike-ovs/openstack.yaml
index 0575c58..1e5d62e 100644
--- a/tcp_tests/templates/virtual-offline-pike-ovs/openstack.yaml
+++ b/tcp_tests/templates/virtual-offline-pike-ovs/openstack.yaml
@@ -344,6 +344,14 @@
   retry: {count: 1, delay: 30}
   skip_fail: false
 
+- description: Enable forward policy on gtw
+  cmd: |
+    set -e;
+    iptables --policy FORWARD ACCEPT;
+  node_name: {{ HOSTNAME_GTW01 }}
+  retry: {count: 1, delay: 30}
+  skip_fail: false
+
 - description: create rc file on cfg
   cmd: scp ctl01:/root/keystonercv3 /root
   node_name: {{ HOSTNAME_CFG01 }}