network, tests: delete the leaked Jobs on the test tear down
network, tests: delete the leaked Jobs on the test tear down

The jobs that checked the reachability of the `Service`s being
created in this module were not being deleted, and as a result,
leaked behind until the test namespace was cleared.

This patch addresses that, by deleting each of the jobs created in
the test tear down.

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

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