This commit fixes an issue where in clusters which have FQDN as the node names,
one of the scheduling predicates tests will fail because it will try and run a
pod with a name that violates DNS-1123 rules. As an example, one such pod name
could look like "filler-pod-kube-node-0.kubelet.mesos".
Signed-off-by: Paulo Pires <pjpires@gmail.com>