minor #19405 Fixed bugs in names of classes and methods. (zomberg)

This PR was squashed before being merged into the 2.7 branch (closes #19405).

Discussion
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Fixed bugs in names of classes and methods.

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | ~
| License       | MIT
| Doc PR        | ~

It's related to case sensitive.

I changed only calls of names of called methods but not definition of methods because BC.

Commits
-------

c41aa03 Fixed bugs in names of classes and methods.

Author: nicolas-grekas

DependencyInjection/FrameworkExtension.php

@@ -823,10 +823,10 @@ private function getValidatorMappingFiles(ContainerBuilder $container)
 
             if (is_dir($dir = $dirname.'/Resources/config/validation')) {
                 foreach (Finder::create()->files()->in($dir)->name('*.xml') as $file) {
-                    $files[0][] = $file->getRealpath();
+                    $files[0][] = $file->getRealPath();
                 }
                 foreach (Finder::create()->files()->in($dir)->name('*.yml') as $file) {
-                    $files[1][] = $file->getRealpath();
+                    $files[1][] = $file->getRealPath();
                 }
 
                 $container->addResource(new DirectoryResource($dir));
@@ -944,13 +944,13 @@ private function registerSerializerConfiguration(array $config, ContainerBuilder
 
             if (is_dir($dir = $dirname.'/Resources/config/serialization')) {
                 foreach (Finder::create()->files()->in($dir)->name('*.xml') as $file) {
-                    $definition = new Definition('Symfony\Component\Serializer\Mapping\Loader\XmlFileLoader', array($file->getRealpath()));
+                    $definition = new Definition('Symfony\Component\Serializer\Mapping\Loader\XmlFileLoader', array($file->getRealPath()));
                     $definition->setPublic(false);
 
                     $serializerLoaders[] = $definition;
                 }
                 foreach (Finder::create()->files()->in($dir)->name('*.yml') as $file) {
-                    $definition = new Definition('Symfony\Component\Serializer\Mapping\Loader\YamlFileLoader', array($file->getRealpath()));
+                    $definition = new Definition('Symfony\Component\Serializer\Mapping\Loader\YamlFileLoader', array($file->getRealPath()));
                     $definition->setPublic(false);
 
                     $serializerLoaders[] = $definition;

Translation/TranslationLoader.php

@@ -58,7 +58,7 @@ public function loadMessages($directory, MessageCatalogue $catalogue)
             $extension = $catalogue->getLocale().'.'.$format;
             $files = $finder->files()->name('*.'.$extension)->in($directory);
             foreach ($files as $file) {
-                $domain = substr($file->getFileName(), 0, -1 * strlen($extension) - 1);
+                $domain = substr($file->getFilename(), 0, -1 * strlen($extension) - 1);
                 $catalogue->addCatalogue($loader->load($file->getPathname(), $catalogue->getLocale(), $domain));
             }
         }