Improving yamllint configuration (#11389)

Signed-off-by: Bas Meijer <bas.meijer@enexis.nl>

roles/container-engine/docker-storage/tasks/main.yml

@@ -10,12 +10,12 @@
   template:
     src: docker-storage-setup.j2
     dest: /etc/sysconfig/docker-storage-setup
-    mode: 0644
+    mode: "0644"
 
 - name: Docker-storage-override-directory | docker service storage-setup override dir
   file:
     dest: /etc/systemd/system/docker.service.d
-    mode: 0755
+    mode: "0755"
     owner: root
     group: root
     state: directory
@@ -30,7 +30,7 @@
 
     owner: root
     group: root
-    mode: 0644
+    mode: "0644"
 
 # https://docs.docker.com/engine/installation/linux/docker-ce/centos/#install-using-the-repository
 - name: Docker-storage-setup | install lvm2