Related to travis-ci/travis-ci#1324.
rvm install jruby-head
Install Maven 3.1.0 with community cookbook v1.0.0
This mature version of http://community.opscode.com/cookbooks/maven
is now able to satisfy Travis CI requirements.
Maven is thus (again) installed from Apache tarball releases, which
offers better flexibility compared to Ubuntu packages.
Shift MAVEN_OPTS to global settings (/etc/mavenrc)
rvm/rvm#2243 released as 1.22.16 (stable)
New names for Maven cookbook and Redis recipe