MDL-36369 qtypes and qbehaviour settings permissions.

The correct policy is that users with moodle/question:config can set the
default settings for particular qtypes. However, it requires
moodle/site:config in order to do manage qbehaviours or manage qtypes.

lib/adminlib.php

@@ -5252,7 +5252,7 @@ class admin_page_manageqbehaviours extends admin_externalpage {
     public function __construct() {
         global $CFG;
         parent::__construct('manageqbehaviours', get_string('manageqbehaviours', 'admin'),
-                new moodle_url('/admin/qbehaviours.php'), 'moodle/question:config');
+                new moodle_url('/admin/qbehaviours.php'));
     }
 
     /**
@@ -5299,8 +5299,8 @@ class admin_page_manageqtypes extends admin_externalpage {
      */
     public function __construct() {
         global $CFG;
-        parent::__construct('manageqtypes', get_string('manageqtypes', 'admin'), "$CFG->wwwroot/$CFG->admin/qtypes.php",
-            'moodle/question:config');
+        parent::__construct('manageqtypes', get_string('manageqtypes', 'admin'),
+                new moodle_url('/admin/qtypes.php'));
     }
 
     /**