tests: check that MTU is configured correctly
tests: check that MTU is configured correctly

We check that MTU is correct both on the pod bridge as well as inside the VM,
and that the VM is able to send frames of maximum allowed size to outside.

stu-gott/kubevirt,davidvossel/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,rmohr/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,stu-gott/kubevirt,rmohr/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,davidvossel/kubevirt