Returns extra config parameters from a virtual machine advanced config list

    vm_name
        Virtual machine name

    datacenter
        Datacenter name where the virtual machine is available

    service_instance
        vCenter service instance for connection and configuration

def get_advanced_configs(vm_name, datacenter, service_instance=None):
    '''
    Returns extra config parameters from a virtual machine advanced config list

    vm_name
        Virtual machine name

    datacenter
        Datacenter name where the virtual machine is available

    service_instance
        vCenter service instance for connection and configuration
    '''
    current_config = get_vm_config(vm_name,
                                   datacenter=datacenter,
                                   objects=True,
                                   service_instance=service_instance)
    return current_config['advanced_configs']