[stable/train] Revert "Remove download_ansible_playbooks"

This is used in update/upgrade tasks.

This reverts commit c8ccbc1246.

Change-Id: Idcae7ab2ca5d491aeb2116ddbe9d376b1b43e53d

tripleoclient/utils.py

@@ -57,6 +57,7 @@ from heatclient import exc as hc_exc
 from six.moves.urllib import error as url_error
 from six.moves.urllib import request
 
+from tripleo_common.utils import config
 from tripleoclient import constants
 from tripleoclient import exceptions
 
@@ -275,6 +276,20 @@ def convert(data):
         return data
 
 
+def download_ansible_playbooks(client, stack_name, output_dir='/tmp'):
+
+    log = logging.getLogger(__name__ + ".download_ansible_playbooks")
+    stack_config = config.Config(client)
+    tmp_ansible_dir = tempfile.mkdtemp(prefix='tripleo-ansible-',
+                                       dir=output_dir)
+
+    log.warning(_('Downloading {0} ansible playbooks...').format(stack_name))
+    stack_config.write_config(stack_config.fetch_config(stack_name),
+                              stack_name,
+                              tmp_ansible_dir)
+    return tmp_ansible_dir
+
+
 def bracket_ipv6(address):
     """Put a bracket around address if it is valid IPv6