dual stack, expose, tests: port UDP services test
dual stack, expose, tests: port UDP services test

Both the ClusterIP and the NodePort service types tests are ported
in this commit.

The NodePort service type requires some changes once the IPv6
family tests are added: since the k8sv1 API does not feature all
the IPs for a node - only the preferred address configurable - it
is not possible to ping from an UDP client to an IPv6 nodePort
service.

This patch forces DNS name resolution within the cluster, thus
enabling the test framework to contact the node via its IP.

Signed-off-by: Miguel Duarte Barroso <c798d3f0e4fda7badfc3bbd91babde7ebd48b6c2@redhat.com>

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