Include MTU adjustment checks in remote VLAN examples

[ljkiraly]

Expected Behavior

The MTU value of the interface in NSC should not be bigger than the MTU value set on base interface

Current Behavior

MTU is not checked currently. Some failures are slipping through the CI

Failure Information (for bugs)

Some failures are slipping through the CI. The sub-interface now don't inherit the MTU from the host interface in vpp. That caused failure in MTU adjustment.

Related PRs

networkservicemesh/sdk-vpp/pull/656 networkservicemesh/sdk-ovs/pull/203