1) Making sure the eth1 nic is not added to contrailVM as it should be added during dv port group changes
2) Adding changes to vcenter provisioning to add the contrailvm to dv port group
3) Added the vcenter and computevm sectios to testbed_multibox example file

Change-Id: I28bd7eff9cb316bd566c2a08fb89405697c154c9
Merge "1) Making sure the eth1 nic is not added to contrailVM as it should be added during dv port group changes 2) Adding changes to vcenter provisioning to add the contrailvm to dv port group 3) Added the vcenter and computevm sectios to testbed_multibox example file"