Merge branch '4.4' into 5.1

* 4.4:
  [ErrorHandler] Return false directly and remove unused variable
  [OptionsResolver] Assert that the error type is valid in deprecations test
  [HttpClient] Allow bearer token with colon
  [Form] Fix custom formats deprecation with HTML5 widgets
  [Translator] Optional Intl dependency
  [Contracts][Translation] Optional Intl dependency
  [ErrorHandler] Escape JSON encoded log context
  update missing translations arabic
  [Yaml] simplify the test
  fix test by letting mock throw the actual expected exception

Author: fabpot

Tests/Data/Bundle/Reader/BundleEntryReaderTest.php

@@ -144,7 +144,10 @@ public function testFallbackIfLocaleDoesNotExist()
                 [self::RES_DIR, 'en_GB'],
                 [self::RES_DIR, 'en']
             )
-            ->willReturnOnConsecutiveCalls(self::$data, self::$fallbackData);
+            ->willReturnOnConsecutiveCalls(
+                $this->throwException(new ResourceBundleNotFoundException()),
+                self::$fallbackData
+            );
 
         $this->assertSame('Lah', $this->reader->readEntry(self::RES_DIR, 'en_GB', ['Entries', 'Bam']));
     }
@@ -283,7 +286,7 @@ public function testFailIfEntryFoundNeitherInParentNorChild()
                 [self::RES_DIR, 'en_GB'],
                 [self::RES_DIR, 'en']
             )
-            ->willReturnOnConsecutiveCalls(['Foo' => 'Baz'], ['Foo' => 'Baz']);
+            ->willReturnOnConsecutiveCalls(['Foo' => 'Baz'], ['Foo' => 'Bar']);
 
         $this->reader->readEntry(self::RES_DIR, 'en_GB', ['Foo', 'Bar'], true);
     }