Add support for CSI in kubernetes.

This includes the configuration of external-provisioner and
external-attacher components for the kubernetes csi base setup,
controlled by labels:
* 'kube_csi_enabled' and 'kube_csi_tag'

It also includes configuration of csi plugins for cephfs and cvmfs, with
tags to control them in a similar way:
* 'cvmfs_csi_enabled' and 'cvmfs_csi_tag'
* 'cephfs_csi_enabled' and 'cephfs_csi_tag'

magnum/drivers/common/templates/kubernetes/fragments/configure-kubernetes-master.sh
magnum/drivers/common/templates/kubernetes/fragments/write-heat-params.sh
magnum/drivers/heat/k8s_fedora_template_def.py
magnum/drivers/k8s_fedora_atomic_v1/templates/kubemaster.yaml
magnum/drivers/k8s_fedora_atomic_v1/templates/kubeminion.yaml

Drop:
magnum/drivers/common/templates/kubernetes/fragments/write-heat-params.yaml

This includes commits:
[cern] update csi-cephfs to csi 1.0
[cern] Add support for cvmfs csi 1.x
[cern] Add PSP

Change-Id: I316284c9195287bda237e99f1bfe9a8f22be87e8