Sets up the CI system for ONOS on Jenkins via Jenkins Job Builder, and the EC2 executor nodes via Packer.
jjb/defaults.yaml: default values used to parameterize all jjb jobs
jjb/onf-macros.yaml: JJB macros used by other jobs that set common behavior and reduce verbosity of normal jobs.
jjb/templates/*.yaml: JJB job-templates that are used by other jobs.
jjb/repos/*.yaml: normal location of per-gerrit-repo validation jobs, file name is the same as the repo name.