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/main/utils/handlers.py

@@ -292,6 +292,21 @@ class UDPHandler(BaseHandler):
         payload = _encode_payload_for_socket(payload)
         return self.socket.sendto(payload, (self._get_host(hostname_only=True), self.port or 0))
 
+    @classmethod
+    def perform_test(cls, settings):
+        """
+        Tests logging connectivity for the current logging settings.
+        """
+        handler = cls.from_django_settings(settings)
+        handler.enabled_flag = True
+        handler.setFormatter(LogstashFormatter(settings_module=settings))
+        logger = logging.getLogger(__file__)
+        fn, lno, func = logger.findCaller()
+        record = logger.makeRecord('awx', 10, fn, lno,
+                                   'AWX Connection Test', tuple(),
+                                   None, func)
+        handler.emit(_encode_payload_for_socket(record))
+
 
 HANDLER_MAPPING = {
     'https': BaseHTTPSHandler,