Add Remove Networks to VMs

Purpose

Add the ability to add/remove networks to/from virtual machines and to change the default network of a virtual machine

Feature Specifications

This will allow users to add/remove NICs from User Virtual Machines. It will also allow users to change which NIC is the default NIC.

Considerations

Currently in cloudstack there can be only on NIC on a network in cloudstack.

API implementation

The new calls are:
addNicToVirtualMachine

removeNicFromVirtualMachine

updateDefaultNicForVirtualMachine