Add default password for VyOS initial config

Signed-off-by: Philip Joseph <philip.joseph@riftio.com>
diff --git a/src/vnfd/VyOS_vnf/VyOS__vnfd.yaml b/src/vnfd/VyOS_vnf/VyOS__vnfd.yaml
index c0f238c..79a11e5 100644
--- a/src/vnfd/VyOS_vnf/VyOS__vnfd.yaml
+++ b/src/vnfd/VyOS_vnf/VyOS__vnfd.yaml
@@ -36,6 +36,8 @@
                 parameter:
                 -   name: hostname
                     value: <rw_mgmt_ip>
+                -   name: pass
+                    value: vyos
                 seq: '1'
             juju:
                 charm: VyOS-proxy