Merge branch '2.8' into 3.0

* 2.8:
  [travis] Disable hirak/prestissimo for deps=low/high tests
  Fixed the "hover" state of the profiler sidebar menu
  [HttpFoundation] fix phpdoc of UploadedFile
  Lower complexity of Form:isValid()
  skipped dns-sensitive tests when DnsMock is not found
  [FrameworkBundle] Return the invokable service if its name is the class name
  [ci] Skip dns-sensitive tests when DnsMock is not found
  Exclude Bridge\PhpUnit from composer.json by default
  fixed CS
  Optimize ReplaceAliasByActualDefinitionPass
  [Process] use __METHOD__ where applicable
  [Routing] Don't needlessly execute strtr's as they are fairly expensive

Conflicts:
	.travis.yml
	src/Symfony/Component/DependencyInjection/Compiler/ReplaceAliasByActualDefinitionPass.php

Author: nicolas-grekas

Resources/views/Profiler/profiler.css.twig

@@ -515,7 +515,9 @@ tr.status-warning td {
     margin-bottom: -99999px; {# needed for 'same-height columns' trick #}
     margin-left: -100%;
     padding-bottom: 99999px; {# needed for 'same-height columns' trick #}
+    position: relative;
     width: 220px;
+    z-index: 9999;
 }
 #sidebar .module {
     padding: 10px;