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

Consistent boolean values in ansible playbooks

roles/etcd/tasks/join_etcd-events_member.yml

@@ -32,7 +32,7 @@
     executable: /bin/bash
   register: etcd_events_member_in_cluster
   changed_when: false
-  check_mode: no
+  check_mode: false
   tags:
     - facts
   environment:
@@ -46,4 +46,4 @@
   service:
     name: etcd-events
     state: started
-    enabled: yes
+    enabled: true