Fix SELinux context for Docker data root

roles/docker/tasks/main.yml

@@ -26,6 +26,10 @@
     path: "{{ docker_data_root }}"
     owner: root
     mode: u=rwx,g=x,o=
+    seuser: system_u
+    serole: object_r
+    setype: container_var_lib_t
+    selevel: s0
     state: directory
 
 - name: Copy Docker daemon config file