* remove need for `k8s-cluster` parent group
* rename kubernetes/preinstall to kubernetes/common
* make kubernetes/common a dep for both node and master
* move all kubernetes defaults to kubernetes/common
* had python errors with new apps role ... feature flagged it off
This should make things a little more composable,
by making these roles meta roles that perform no
actions by default we allow each role to own its own
resources.