bring back empty excluded-tests-23 since it is refered in build.xml
bring back empty excluded-tests-23 since it is refered in build.xml

git-svn-id: c4d08399a8c07badad33cbf13a0909bacb78f41f@1620947 13f79535-47bb-0310-9956-ffa450edef68

apache/pig,apache/pig,apache/pig,apache/pig,apache/pig,apache/pig,apache/pig