Wait for autocomplete to return all 3 issues in order to avoid @StaleElementReferenceError@ (#38852).

git-svn-id: https://svn.redmine.org/redmine/trunk@22429 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/system/inline_autocomplete_test.rb

@@ -52,6 +52,7 @@ class InlineAutocompleteSystemTest < ApplicationSystemTestCase
     within('.tribute-container') do
       assert page.has_text? 'Bug #12: Closed issue on a locked version'
       assert page.has_text? 'Bug #11: Closed issue on a closed version'
+      assert page.has_text? 'Bug #8: Closed issue'
 
       first('li').click
     end