[Security] Fix "exclude-from-classmap"

The "/Tests/" directory doesn't exist in the Security Component, tests are located within the Security components folders and none of the tests were being excluded in an --classmap-authoritative dump of the autoload.

Author: acasademont

composer.json

@@ -55,7 +55,10 @@
     "autoload": {
         "psr-4": { "Symfony\\Component\\Security\\": "" },
         "exclude-from-classmap": [
-            "/Tests/"
+            "/Core/Tests/",
+            "/Csrf/Tests/",
+            "/Guard/Tests/",
+            "/Http/Tests/"
         ]
     },
     "minimum-stability": "dev",