Inclusion of fix for JBSEAM-2974 into supported Seam 2

When uploading files with <s:fileUpload> inside <h:dataTable>, errors occurred which led to identical filenames and incorrect content. This occurred because the local value was not returned by the <methodname>getLocalValue()</methodname> method. This problem has been fixed by correcting the method, and the problems with the filenames and content no longer occur.