Merge branch '3.2'

* 3.2: (27 commits)
  Improve tracking of environment variables in the case of private services
  [DI] Align AutowirePass with 2.8
  property constraints can be added in child classes
  added test for staticClassLoader in LazyLoadingMetadatafactory
  fixed PHPUnit setUp and tearDown method visibility
  spelling fixes
  Readd Symfony version status in the toolbar
  [Security] LdapUserProvider should not throw an exception if the UID key does not exist in an LDAP entry
  make sure that null can be the invalid value
  [VarDumper] Improve dump of AMQP* Object
  Fix annotations cache folder path
  [FrameworkBundle] Wire ArrayCache for annotation reader at bootstrap
  Ignore missing 'debug.file_link_formatter' service in Debug bundle
  [VarDumper] Fixed dumping of terminated generator
  bumped Symfony version to 3.2.4
  updated VERSION for 3.2.3
  updated CHANGELOG for 3.2.3
  bumped Symfony version to 2.8.18
  updated VERSION for 2.8.17
  updated CHANGELOG for 2.8.17
  ...

Core/Tests/User/LdapUserProviderTest.php

@@ -151,10 +151,7 @@ public function testLoadUserByUsernameFailsIfMoreThanOneLdapPasswordsInEntry()
         );
     }
 
-    /**
-     * @expectedException \Symfony\Component\Security\Core\Exception\InvalidArgumentException
-     */
-    public function testLoadUserByUsernameFailsIfEntryHasNoUidKeyAttribute()
+    public function testLoadUserByUsernameShouldNotFailIfEntryHasNoUidKeyAttribute()
     {
         $result = $this->getMockBuilder(CollectionInterface::class)->getMock();
         $query = $this->getMockBuilder(QueryInterface::class)->getMock();

Core/User/LdapUserProvider.php

@@ -48,7 +48,7 @@ class LdapUserProvider implements UserProviderInterface
     public function __construct(LdapInterface $ldap, $baseDn, $searchDn = null, $searchPassword = null, array $defaultRoles = array(), $uidKey = 'sAMAccountName', $filter = '({uid_key}={username})', $passwordAttribute = null)
     {
         if (null === $uidKey) {
-            $uidKey = 'uid';
+            $uidKey = 'sAMAccountName';
         }
 
         $this->ldap = $ldap;
@@ -87,7 +87,13 @@ public function loadUserByUsername($username)
         }
 
         $entry = $entries[0];
-        $username = $this->getAttributeValue($entry, $this->uidKey);
+
+        try {
+            if (null !== $this->uidKey) {
+                $username = $this->getAttributeValue($entry, $this->uidKey);
+            }
+        } catch (InvalidArgumentException $e) {
+        }
 
         return $this->loadUser($username, $entry);
     }
@@ -123,6 +129,7 @@ public function supportsClass($class)
     protected function loadUser($username, Entry $entry)
     {
         $password = null;
+
         if (null !== $this->passwordAttribute) {
             $password = $this->getAttributeValue($entry, $this->passwordAttribute);
         }