Fixed the test failure. There's no beta module in YUI 2.9, and we got some old...

Fixed the test failure. There's no beta module in YUI 2.9, and we got some old plugins that's specifying beta for modules that have graduated.

core/src/main/resources/lib/layout/yui.jelly

@@ -29,9 +29,12 @@ THE SOFTWARE.
     <st:attribute name="module" use="required">
       YUI module name to load.
     </st:attribute>
-    <st:attribute name="suffix">
-      if loading beta module, use suffix='-beta'
-    </st:attribute>
   </st:documentation>
-  <script src="${resURL}/scripts/yui/${module}/${module}${attrs.suffix}-${yuiSuffix}.js" />
+  <!--
+    We used to take @suffix as '-beta' to loa beta modules, but as of YUI 2.9 there's no beta module.
+    I don't think YUI2 will get new beta modules in the future, but if we do, we need to compute them
+    from the module name, since older plugins specify suffix="-beta" for modules that have graduated
+    beta since then.
+  -->
+  <script src="${resURL}/scripts/yui/${module}/${module}-${yuiSuffix}.js" />
 </j:jelly>
\ No newline at end of file