Examples for ordering by location

[allmightyspiff]

Add an example for how to order by location

• Ordering hardware and virtual by backend/frontend vlan
  • How to find the vlanId
  • Note that its not the vlan NUMBER
• Ordering hardware and virtual by routerId
• Ordering vlan by routerId
• How to find the routerId

[khayama-zz]

Let me follow this issue, thanks.