Hyper-V networking QoS

Msvm_EthernetSwitchPortBandwidthSettingData[1] class can be used in order to set the QoS policy details for the given port. The following fields can be set with the details received: BurstLimit, BurstSize, Limit and Reservation.

There are some limitations regarding the Limit and Reservation:

* both has to be greater than 10MB in order to be set, otherwise an exception will be raised
* Limit has to be greater than Reservation
* BurstLimit has to be greater than Limit

[1]: https://msdn.microsoft.com/en-us/library/hh850145(v=vs.85).aspx