[COCOON-2336] Adding -Dloader.class.path=lib\core\servlet-2.3.jar to the :doServlet section of cocoon.bat

git-svn-id: https://svn.apache.org/repos/asf/cocoon/branches/BRANCH_2_1_X@1489316 13f79535-47bb-0310-9956-ffa450edef68