Merge branch '2.7' into 2.8

* 2.7:
  Lighten tests output by removing composer suggestions
  CS: Remove invisible chars
  Disable resource tracking if the config component is missing
  [EventDispatcher] Remove unneded count()
  Fix tests expecting a valid date
  [Console] Fix table cell styling
  [Console] Revised exception rendering
  [WebProfilerBundle] Normalize whitespace in exceptions passed in headers
  Disable color support detection for tests
  [Form] Improve the exceptions when trying to get the data in a PRE_SET_DATA listener and the data has not already been set

Author: nicolas-grekas

ContainerBuilder.php

@@ -26,6 +26,7 @@
 use Symfony\Component\Config\Resource\ResourceInterface;
 use Symfony\Component\DependencyInjection\LazyProxy\Instantiator\InstantiatorInterface;
 use Symfony\Component\DependencyInjection\LazyProxy\Instantiator\RealServiceInstantiator;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
 use Symfony\Component\ExpressionLanguage\Expression;
 use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
 
@@ -73,7 +74,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      */
     private $compiler;
 
-    private $trackResources = true;
+    private $trackResources;
 
     /**
      * @var InstantiatorInterface|null
@@ -90,6 +91,13 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      */
     private $expressionLanguageProviders = array();
 
+    public function __construct(ParameterBagInterface $parameterBag = null)
+    {
+        parent::__construct($parameterBag);
+
+        $this->trackResources = interface_exists('Symfony\Component\Config\Resource\ResourceInterface');
+    }
+
     /**
      * @var string[] with tag names used by findTaggedServiceIds
      */