https://issues.apache.org/jira/browse/XALANJ-2580
Upgrade to Xerces-J 2.11.0 and XML Commons External 1.4.01

git-svn-id: https://svn.apache.org/repos/asf/xalan/java/branches/xalan-j_2_7_1_maint@1581609 13f79535-47bb-0310-9956-ffa450edef68