'Specify which network resources should be created
@param network
@param router
@param subnet
@param dhcp'

@classmethod
def set_network_resources(cls, network=False, router=False, subnet=False, dhcp=False):

    if (not cls.network_resources):
        cls.network_resources = {'network': network, 'router': router, 'subnet': subnet, 'dhcp': dhcp}
