Return the Ethernet and IP+mask addresses assigned to a
        given interface on a node.

def getInterfaceAddresses(self, node, interface):
        '''
        Return the Ethernet and IP+mask addresses assigned to a
        given interface on a node.
        '''
        intf = self.getNode(node)['nodeobj'].getInterface(interface)
        return intf.ethaddr,intf.ipaddr,intf.netmask