Use include/import tasks (#2192)

import_tasks will consume far less memory, so it should be
used whenever it is compatible.

roles/vault/tasks/shared/create_role.yml

@@ -40,7 +40,7 @@
 
 ## Userpass based auth method
 
-- include: gen_userpass.yml
+- include_tasks: gen_userpass.yml
   vars:
     gen_userpass_password: "{{ create_role_password }}"
     gen_userpass_policies: "{{ create_role_name }}"

roles/vault/tasks/shared/sync_auth_certs.yml

 ---
 
-- include: sync_file.yml
+- include_tasks: sync_file.yml
   vars:
     sync_file: "auth-ca.pem"
     sync_file_dir: "{{ vault_cert_dir }}"

roles/vault/tasks/shared/sync_file.yml

@@ -80,7 +80,7 @@
   set_fact:
     sync_file_results: "{{ sync_file_results|default([]) + [sync_file_result] }}"
 
-- include: sync.yml
+- include_tasks: sync.yml
   when: not (sync_file_no_srcs or sync_file_unneeded)
 
 - name: "Unset local vars to avoid variable bleed into next iteration"