Merge branch '2.7' into 2.8

* 2.7: (28 commits)
  [Process] Use stream based storage to avoid memory issues
  Fix upgrade guides concerning erroneous removal of assets helper
  [Process] Remove a misleading comment
  Fix markdown typo
  ChooseBaseUrl should return an index
  [Form] ChoiceType: Fix a notice when 'choices' normalizer is replaced
  Improve the phpdoc of SplFileInfo methods
  [Process] Use stream based storage to avoid memory issues
  [FrameworkBundle] Don't log twice with the error handler
  Remove useless is_object condition
  [Process] Fix typo, no arguments needed anymore
  [Serializer] Introduce constants for context keys
  Fixed the documentation of VoterInterface::supportsAttribute
  Fixed Bootstrap form theme form "reset" buttons
  Remove useless duplicated tests
  [FrameworkBundle] Optimize framework extension tests
  synchronize 2.7 and 3.0 upgrade files
  fix merge 2.3 into 2.7 for SecureRandom dependency
  Use is_subclass_of instead of reflection
  Use is_subclass_of instead of Reflection when possible
  ...

Author: fabpot

Logger/DbalLogger.php

@@ -49,12 +49,8 @@ public function startQuery($sql, array $params = null, array $types = null)
             $this->stopwatch->start('doctrine', 'doctrine');
         }
 
-        if (is_array($params)) {
-            $params = $this->normalizeParams($params);
-        }
-
         if (null !== $this->logger) {
-            $this->log($sql, null === $params ? array() : $params);
+            $this->log($sql, null === $params ? array() : $this->normalizeParams($params));
         }
     }