lvm_self_backup: Adjust directory permissions

This patch reduces the permissions on the install directory to just the root user and also fixes the ansible-lint issue by specifying the `mode`.

roles/lvm_self_backup/tasks/main.yml

@@ -21,6 +21,9 @@
   file:
     path: "/backup_snapshots/{{ item.vg_name }}-{{ item.lv_name }}"
     state: directory
+    mode: '0700'
+    owner: 'root'
+    group: 'root'
     recurse: true
   with_items:
     - "{{ backup_vols }}"
@@ -30,9 +33,9 @@
   template:
     src: "{{ item.src }}"
     dest: "{{ item.dest }}"
-    mode: '1700'
-    owner: root
-    group: root
+    mode: '0700'
+    owner: 'root'
+    group: 'root'
   with_items:
     - src: "backup-lvm.sh"
       dest: "/usr/local/bin/backup-lvm"
@@ -45,8 +48,8 @@
     src: "{{ item }}"
     dest: /etc/systemd/system/
     mode: '0755'
-    owner: root
-    group: root
+    owner: 'root'
+    group: 'root'
   with_items:
     - "backup-lvm.service"
     - "backup-lvm.timer"