Merge remote-tracking branch 'tower/release_3.2.3' into devel

* tower/release_3.2.3:
  fix unicode bugs with log statements
  use --export option for ansible-inventory
  add support for new "BECOME" prompt in Ansible 2.5+ for adhoc commands
  enforce strings for secret password inputs on Credentials
  fix a bug for "users should be able to change type of unused credential"
  fix xss vulnerabilities - on host recent jobs popover - on schedule name tooltip
  fix a bug when testing UDP-based logging configuration
  bump templates form credential_types page limit
  Wait for Slack RTM API websocket connection to be established
  don't process artifacts from custom `set_stat` calls asynchronously
  don't overwrite env['ANSIBLE_LIBRARY'] when fact caching is enabled
  only allow facts to cache in the proper file system location
  replace our memcached-based fact cache implementation with local files
  add support for new "BECOME" prompt in Ansible 2.5+
  fix a bug in inventory generation for isolated nodes
  properly handle unicode for isolated job buffers

awx/lib/tests/test_display_callback.py

@@ -7,7 +7,9 @@ from collections import OrderedDict
 import json
 import mock
 import os
+import shutil
 import sys
+import tempfile
 
 import pytest
 
@@ -259,3 +261,26 @@ def test_callback_plugin_strips_task_environ_variables(executor, cache, playbook
     assert len(cache)
     for event in cache.values():
         assert os.environ['PATH'] not in json.dumps(event)
+
+
+@pytest.mark.parametrize('playbook', [
+{'custom_set_stat.yml': '''
+- name: custom set_stat calls should persist to the local disk so awx can save them
+  connection: local
+  hosts: all
+  tasks:
+    - set_stats:
+        data:
+          foo: "bar"
+'''},  # noqa
+])
+def test_callback_plugin_saves_custom_stats(executor, cache, playbook):
+    try:
+        private_data_dir = tempfile.mkdtemp()
+        with mock.patch.dict(os.environ, {'AWX_PRIVATE_DATA_DIR': private_data_dir}):
+            executor.run()
+            artifacts_path = os.path.join(private_data_dir, 'artifacts', 'custom')
+            with open(artifacts_path, 'r') as f:
+                assert json.load(f) == {'foo': 'bar'}
+    finally:
+        shutil.rmtree(os.path.join(private_data_dir))