Further to my answer.. I tried the following and was able to get bridged mode working :
Just checking to see if you were able to get this working. And if you did, would you please mind marking the answer as accepted? Thanks!
I followed the same steps but on Ubuntu but when i start my VirtualBox UI i dont see any VM being created but my metron is running. Do the VM need to be imported manually in the Virtualbox to change the ip address?