XWIKI-21527: Add missing java.base/java.io and java.base/java.util.concurrent --add-opens

* Also fix our Docker test framework

xwiki-platform-core/xwiki-platform-test/xwiki-platform-test-docker/src/main/java/org/xwiki/test/docker/internal/junit5/servletengine/ServletContainerExecutor.java

@@ -425,7 +425,8 @@ && isInAContainer())
     private void addJava17AddOpens(List<String> list)
     {
         list.add("--add-opens java.base/java.lang=ALL-UNNAMED");
+        list.add("--add-opens java.base/java.io=ALL-UNNAMED");
         list.add("--add-opens java.base/java.util=ALL-UNNAMED");
-        list.add("--add-opens java.base/java.concurrent=ALL-UNNAMED");
+        list.add("--add-opens java.base/java.util.concurrent=ALL-UNNAMED");
     }
 }