Move kubernetes/master to kubernetes/control-plane (#7218)

This is a small step to replace "master" with "control-plane" in
Kubespray project.

cluster.yml

@@ -65,7 +65,7 @@
   any_errors_fatal: "{{ any_errors_fatal | default(true) }}"
   roles:
     - { role: kubespray-defaults }
-    - { role: kubernetes/master, tags: master }
+    - { role: kubernetes/control-plane, tags: master }
     - { role: kubernetes/client, tags: client }
     - { role: kubernetes-apps/cluster_roles, tags: cluster-roles }
 

docs/vars.md

@@ -153,7 +153,7 @@ node_taints:
   * `audit_log_maxsize`: 100
   * `audit_policy_file`: "{{ kube_config_dir }}/audit-policy/apiserver-audit-policy.yaml"
 
-  By default, the `audit_policy_file` contains [default rules](https://github.com/kubernetes-sigs/kubespray/blob/master/roles/kubernetes/master/templates/apiserver-audit-policy.yaml.j2) that can be overridden with the `audit_policy_custom_rules` variable.
+  By default, the `audit_policy_file` contains [default rules](https://github.com/kubernetes-sigs/kubespray/blob/master/roles/kubernetes/control-plane/templates/apiserver-audit-policy.yaml.j2) that can be overridden with the `audit_policy_custom_rules` variable.
 
 ### Custom flags for Kube Components
 

extra_playbooks/upgrade-only-k8s.yml

@@ -41,7 +41,7 @@
     - { role: kubespray-defaults}
     - { role: upgrade/pre-upgrade, tags: pre-upgrade }
     - { role: kubernetes/node, tags: node }
-    - { role: kubernetes/master, tags: master, upgrade_cluster_setup: true }
+    - { role: kubernetes/control-plane, tags: master, upgrade_cluster_setup: true }
     - { role: kubernetes/client, tags: client }
     - { role: kubernetes-apps/cluster_roles, tags: cluster-roles }
     - { role: upgrade/post-upgrade, tags: post-upgrade }