[network-guide] Update DVR scenario for Kilo
[network-guide] Update DVR scenario for Kilo

Update DVR scenario content for Kilo release.

Change-Id: I8fe2c01e922693d5d2384acba68fc2424243063a
Partial-Bug: #1465778

AlekhyaMallina-Vedams/openstack-manuals,potsmaster/openstack-manuals,openstack/openstack-manuals,saeki-masaki/openstack-manuals,openstack/openstack-manuals,kairoaraujo/openstack-manuals,Akasurde/openstack-manuals,openstack/openstack-manuals,kairoaraujo/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,saeki-masaki/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,Akasurde/openstack-manuals,openstack/openstack-manuals,potsmaster/openstack-manuals