resolve parameters before the configs are processed

If the raw values are passed to the processor, config values don't
necessarily have the expected data type. For example, the value of
the kernel.debug parameter is a boolean type. But when passed as the
raw parameter name, it is a string.

src/Symfony/Bundle/FrameworkBundle/Command/ConfigDebugCommand.php

@@ -75,11 +75,11 @@ EOF
 
         $this->validateConfiguration($extension, $configuration);
 
+        $configs = $container->getParameterBag()->resolveValue($configs);
+
         $processor = new Processor();
         $config = $processor->processConfiguration($configuration, $configs);
 
-        $config = $container->getParameterBag()->resolveValue($config);
-
         if ($name === $extension->getAlias()) {
             $output->writeln(sprintf('# Current configuration for extension with alias: "%s"', $name));
         } else {