Merge branch '2.8' into 3.1

* 2.8:
  always check for all fields to be mapped
  clarify exception when no args are configured
  [PropertyAccess] Handle interfaces in the invalid argument exception
  [DI] Fix defaults overriding empty strings in AutowirePass
  [Debug] Workaround "null" $context
  [Debug] Remove $context arg from handleError(), preparing for PHP 7.2
  [Routing] Fix BC break in AnnotationClassLoader defaults attributes handling
  Fix tests with ICU 57.1
  Fix the condition checking the minimum ICU version

Author: fabpot

Tests/Extension/Core/Type/DateTypeTest.php

@@ -69,10 +69,10 @@ public function testSubmitFromSingleTextDateTimeWithDefaultFormat()
 
     public function testSubmitFromSingleTextDateTime()
     {
-        // we test against "de_AT", so we need the full implementation
+        // we test against "de_DE", so we need the full implementation
         IntlTestHelper::requireFullIntl($this, false);
 
-        \Locale::setDefault('de_AT');
+        \Locale::setDefault('de_DE');
 
         $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\DateType', null, array(
             'format' => \IntlDateFormatter::MEDIUM,
@@ -90,10 +90,10 @@ public function testSubmitFromSingleTextDateTime()
 
     public function testSubmitFromSingleTextString()
     {
-        // we test against "de_AT", so we need the full implementation
+        // we test against "de_DE", so we need the full implementation
         IntlTestHelper::requireFullIntl($this, false);
 
-        \Locale::setDefault('de_AT');
+        \Locale::setDefault('de_DE');
 
         $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\DateType', null, array(
             'format' => \IntlDateFormatter::MEDIUM,
@@ -111,10 +111,10 @@ public function testSubmitFromSingleTextString()
 
     public function testSubmitFromSingleTextTimestamp()
     {
-        // we test against "de_AT", so we need the full implementation
+        // we test against "de_DE", so we need the full implementation
         IntlTestHelper::requireFullIntl($this, false);
 
-        \Locale::setDefault('de_AT');
+        \Locale::setDefault('de_DE');
 
         $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\DateType', null, array(
             'format' => \IntlDateFormatter::MEDIUM,
@@ -134,10 +134,10 @@ public function testSubmitFromSingleTextTimestamp()
 
     public function testSubmitFromSingleTextRaw()
     {
-        // we test against "de_AT", so we need the full implementation
+        // we test against "de_DE", so we need the full implementation
         IntlTestHelper::requireFullIntl($this, false);
 
-        \Locale::setDefault('de_AT');
+        \Locale::setDefault('de_DE');
 
         $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\DateType', null, array(
             'format' => \IntlDateFormatter::MEDIUM,
@@ -398,10 +398,10 @@ public function testThrowExceptionIfDaysIsInvalid()
 
     public function testSetDataWithNegativeTimezoneOffsetStringInput()
     {
-        // we test against "de_AT", so we need the full implementation
+        // we test against "de_DE", so we need the full implementation
         IntlTestHelper::requireFullIntl($this, false);
 
-        \Locale::setDefault('de_AT');
+        \Locale::setDefault('de_DE');
 
         $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\DateType', null, array(
             'format' => \IntlDateFormatter::MEDIUM,
@@ -420,10 +420,10 @@ public function testSetDataWithNegativeTimezoneOffsetStringInput()
 
     public function testSetDataWithNegativeTimezoneOffsetDateTimeInput()
     {
-        // we test against "de_AT", so we need the full implementation
+        // we test against "de_DE", so we need the full implementation
         IntlTestHelper::requireFullIntl($this, false);
 
-        \Locale::setDefault('de_AT');
+        \Locale::setDefault('de_DE');
 
         $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\DateType', null, array(
             'format' => \IntlDateFormatter::MEDIUM,