ARIES-727 make the commons-jexl a optional dependency. People won't need this if they don't use the syntax ${a+b} in blueprint-ext.

git-svn-id: https://svn.apache.org/repos/asf/aries/branches/0.3-RCx@1163899 13f79535-47bb-0310-9956-ffa450edef68
6 files changed