Test Server with Multiple Network Interfaces Scenario

Currently, all the tests in the network scenario test only boot VM on one network. We need to add a scenario test to cover that VM is boot on multiple networks (e.g. 2).

Here are the proposed steps to test:
1. Create a network topology with multiple DHCP enabled networks
2. Boot VM on these networks
3. Check network connectivity both internally and externally
4. Check Metadata request

Another related scenario is to boot VM on one network but with multiple subnets.
Here are the proposed steps:
1. Create a network topology with one network with multiple DHCP enabled subnets
2. Boot VM on this network
3. Check network connectivity both internally and externally
4. Check Metadata request