Refactor roles and hosts

Shorten deployment time with:
- Remove redundand roles if duplicated by a dependency and vice versa
- When a member of k8s-cluster, always install docker as a dependency
  of the etcd role and drop the docker role from cluster.yaml.
- Drop etcd and node role dependencies from master role as they are
  covered by the node role in k8s-cluster group as well. Copy defaults
  for master from node role.
- Decouple master, node, secrets roles handlers and vars to be used w/o
  cross references.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

roles/kubernetes/node/defaults/main.yml

@@ -1,12 +1,6 @@
 # This is where all the cert scripts and certs will be located
 kube_cert_dir: "{{ kube_config_dir }}/ssl"
 
-# This is where all of the bearer tokens will be stored
-kube_token_dir: "{{ kube_config_dir }}/tokens"
-
-# This is where to save basic auth file
-kube_users_dir: "{{ kube_config_dir }}/users"
-
 dns_domain: "{{ cluster_name }}"
 
 # resolv.conf to base dns config
@@ -14,10 +8,6 @@ kube_resolv_conf: "/etc/resolv.conf"
 
 kube_proxy_mode: iptables
 
-# An experimental dev/test only dynamic volumes provisioner,
-# for PetSets. Works for kube>=v1.3 only.
-kube_hostpath_dynamic_provisioner: "false"
-
 hyperkube_image_repo: "quay.io/coreos/hyperkube"
 hyperkube_image_tag: "{{ kube_version }}_coreos.0"