Added support for warn logging level messages to ScriptLogger utility classes and updated forms JS script to use it

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@13169 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/jscript/ScriptLogger.java

@@ -46,6 +46,16 @@ public final class ScriptLogger extends BaseProcessorExtension
         logger.debug(str);
     }
     
+    public boolean isWarnLoggingEnabled()
+    {
+        return logger.isWarnEnabled();
+    }
+    
+    public void warn(String str)
+    {
+        logger.warn(str);
+    }
+
     public SystemOut getSystem()
     {
         return systemOut;