updated the cord repo to support the new network design

Change-Id: I06d89481206cc03a74281af8c0240baa3efe4186
(cherry picked from commit a858b05bb629fde142a21920d9a5d58384be19c9)
diff --git a/ansible/roles/prod/files/mgmtbr.cfg b/ansible/roles/prod/files/mgmtbr.cfg
new file mode 100644
index 0000000..626ab3c
--- /dev/null
+++ b/ansible/roles/prod/files/mgmtbr.cfg
@@ -0,0 +1,8 @@
+auto mgmtbr
+iface mgmtbr inet static
+    address 10.1.0.1
+    network 10.1.0.0
+    netmask 255.255.255.0
+    broadcast 10.1.0.255
+    gateway 10.1.0.1
+    bridge_ports eth2