Annotate the available tests as @small

tests/MD_STD_SECTest.php

@@ -17,9 +17,7 @@ final class MD_STD_SECTest extends TestCase {
     /**
      * Function for testing if the page can be opened using invalid values for objektnum.
      *
-     * @author Joshua Ramon Enslin <joshua@museum-digital.de>
-     * @group  MissingInputs
-     * @group  SafeForProduction
+     * @small
      *
      * @return void
      */