[CE-173] Fix the ip forwarding issue

newer docker version stops iptable forwarding so that
traffic from outside the host machine can not pass through
this creates problems when we need to allow the traffic.
this patch set will fix that problem.

Change-Id: Ib39ea2aa848c826765d1e7835272718054f7ab15
Signed-off-by: tongliofcary <litong01@us.ibm.com>

src/agent/ansible/roles/env_flanneld/networksetup/tasks/apply.yml

@@ -66,6 +66,9 @@
     dest: "/lib/systemd/system/flanneld.service"
     mode: 0644
 
+- name: Change IP Forwarding
+  command: iptables -P FORWARD ACCEPT
+
 - name: Reload services
   command: systemctl daemon-reload