Rename master to control plane - non-breaking changes only (#11394)

K8s is moving away from the "master" terminology, so kubespray should follow the same naming conventions. See 65d886bb30/sig-architecture/naming/recommendations/001-master-control-plane.md

roles/kubernetes/tokens/tasks/gen_tokens.yml

@@ -8,15 +8,15 @@
   delegate_to: "{{ groups['kube_control_plane'][0] }}"
   when: gen_tokens | default(false)
 
-- name: Gen_tokens | generate tokens for master components
+- name: Gen_tokens | generate tokens for control plane components
   command: "{{ kube_script_dir }}/kube-gen-token.sh {{ item[0] }}-{{ item[1] }}"
   environment:
     TOKEN_DIR: "{{ kube_token_dir }}"
   with_nested:
     - [ "system:kubectl" ]
     - "{{ groups['kube_control_plane'] }}"
-  register: gentoken_master
-  changed_when: "'Added' in gentoken_master.stdout"
+  register: gentoken_control_plane
+  changed_when: "'Added' in gentoken_control_plane.stdout"
   run_once: true
   delegate_to: "{{ groups['kube_control_plane'][0] }}"
   when: gen_tokens | default(false)
@@ -34,7 +34,7 @@
   delegate_to: "{{ groups['kube_control_plane'][0] }}"
   when: gen_tokens | default(false)
 
-- name: Gen_tokens | Get list of tokens from first master
+- name: Gen_tokens | Get list of tokens from first control plane node
   command: "find {{ kube_token_dir }} -maxdepth 1 -type f"
   register: tokens_list
   check_mode: false
@@ -52,7 +52,7 @@
   run_once: true
   when: sync_tokens | default(false)
 
-- name: Gen_tokens | Copy tokens on masters
+- name: Gen_tokens | Copy tokens on control plane nodes
   shell: "set -o pipefail && echo '{{ tokens_data.stdout | quote }}' | base64 -d | tar xz -C /"
   args:
     executable: /bin/bash