Fix 'App' object has no attribute 'queue' (#1243316)

Bad name of App property queue. The name needs to be queue_instance.
Fix import queue as queue :)

Resolves: rhbz#1243316

pyanaconda/ui/tui/__init__.py

@@ -31,7 +31,7 @@
 import os
 import sys
 import site
-import queue as queue
+import queue
 import meh.ui.text
 import logging
 log = logging.getLogger("anaconda")
@@ -204,8 +204,8 @@ def _send_show_message(self, msg_fn, args, ret_queue):
 
         """
 
-        self._app.queue.put((hubQ.HUB_CODE_SHOW_MESSAGE,
-                             [msg_fn, args, ret_queue]))
+        self._app.queue_instance.put((hubQ.HUB_CODE_SHOW_MESSAGE,
+                                     [msg_fn, args, ret_queue]))
 
     def _handle_show_message(self, event, data):
         """