Add code to install ant to support java binding

use ensure_packages to avoid double definition
install ant using maestrodev-ant
Update gemfile.lock
Merge branch 'master' into add-java-bindings
Add support for java binding

Install java + ant and compile with --with-java
Configure rake clean to remove fixtures and pkg
Merge pull request #1 from Spantree/add-java-bindings

Add java bindings