Fix inconsistent variables in task name and task message

roles/docker/defaults/main.yml

@@ -17,7 +17,7 @@ dockerproject_repo_key_info:
 dockerproject_repo_info:
   repos:
 
-docker_dns_servers_strict: yes
+docker_dns_servers_strict: true
 
 docker_container_storage_setup: false
 

roles/docker/tasks/set_facts_dns.yml

@@ -56,7 +56,7 @@
 
 - name: check number of nameservers
   fail:
-    msg: "Too many nameservers. You can relax this check by set docker_dns_servers_strict=no and we will only use the first 3."
+    msg: "Too many nameservers. You can relax this check by set docker_dns_servers_strict=false in all.yml and we will only use the first 3."
   when: docker_dns_servers|length > 3 and docker_dns_servers_strict|bool
 
 - name: rtrim number of nameservers to 3