Fix bootsrap-os role, failing to create remote_tmp (#4384)

* Fix bootsrap-os role, failing to create remote_tmp

* use ansible_remote_tmp hostvar

roles/bootstrap-os/tasks/main.yml

@@ -30,7 +30,7 @@
 
 - name: Create remote_tmp for it is used by another module
   file:
-    path: "{{ lookup('config', 'DEFAULT_REMOTE_TMP', on_missing='skip', wantlist=True) | first | default('~/.ansible/tmp') }}"
+    path: "{{ ansible_remote_tmp | default('~/.ansible/tmp') }}"
     state: directory
     mode: 0700