feature symfony#23862 [SecurityBundle] resolve class name parameter inside AddSecurityVotersPass (pjarmalavicius)

This PR was squashed before being merged into the 3.4 branch (closes symfony#23862).

Discussion
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[SecurityBundle] resolve class name parameter inside AddSecurityVotersPass

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony#23733
| License       | MIT

Commits
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a86bf52 [SecurityBundle] resolve class name parameter inside AddSecurityVotersPass

Author: Robin Chalas

src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/AddSecurityVotersPass.php

@@ -42,7 +42,8 @@ public function process(ContainerBuilder $container)
         }
 
         foreach ($voters as $voter) {
-            $class = $container->getDefinition((string) $voter)->getClass();
+            $definition = $container->getDefinition((string) $voter);
+            $class = $container->getParameterBag()->resolveValue($definition->getClass());
 
             if (!is_a($class, VoterInterface::class, true)) {
                 @trigger_error(sprintf('Using a security.voter tag on a class without implementing the %1$s is deprecated as of 3.4 and will be removed in 4.0. Implement the %1$s instead.', VoterInterface::class), E_USER_DEPRECATED);