JEXL: Added clear statement about compatibility break
JEXL:
Added clear statement about compatibility break

git-svn-id: 4652571f3dffef9654f8145d6bccf468f90ae391@1786387 13f79535-47bb-0310-9956-ffa450edef68

apache/commons-jexl,apache/commons-jexl,apache/commons-jexl