Comment 4 for bug 1559652

At the moment it seems like any change to the mechanism of adding ports will increase the time of port-addition in the common case of only a few ports for every router.
So it seems it is not cost-effective to fix the rare case of hundreds of ports per router on the cost of the more common one.
Anyway the scale we aim at is in number of routers per tenant and not in number of ports per router.