Do not use ‘yes/no’ for boolean values (#11472)

Consistent boolean values in ansible playbooks

roles/adduser/vars/coreos.yml

@@ -3,6 +3,6 @@ addusers:
   - name: kube
     comment: "Kubernetes user"
     shell: /sbin/nologin
-    system: yes
+    system: true
     group: "{{ kube_cert_group }}"
-    create_home: no
+    create_home: false

roles/adduser/vars/debian.yml

@@ -2,14 +2,14 @@
 addusers:
   - name: etcd
     comment: "Etcd user"
-    create_home: yes
+    create_home: true
     home: "{{ etcd_data_dir }}"
-    system: yes
+    system: true
     shell: /sbin/nologin
 
   - name: kube
     comment: "Kubernetes user"
-    create_home: no
-    system: yes
+    create_home: false
+    system: true
     shell: /sbin/nologin
     group: "{{ kube_cert_group }}"

roles/adduser/vars/redhat.yml

@@ -2,14 +2,14 @@
 addusers:
   - name: etcd
     comment: "Etcd user"
-    create_home: yes
+    create_home: true
     home: "{{ etcd_data_dir }}"
-    system: yes
+    system: true
     shell: /sbin/nologin
 
   - name: kube
     comment: "Kubernetes user"
-    create_home: no
-    system: yes
+    create_home: false
+    system: true
     shell: /sbin/nologin
     group: "{{ kube_cert_group }}"