+ - nitrogen:
+ branch: 'master'
+ jre: 'openjdk8'
+ - carbon:
+ branch: 'stable/carbon'
+ jre: 'openjdk8'
+ - boron:
+ branch: 'stable/boron'
+ jre: 'openjdk8'
+ - beryllium:
+ branch: 'stable/beryllium'
+ jre: 'openjdk7'
+ tools_system_image: Ubuntu 14.04 - mininet - 20170210-0439