Artifactory plugin
Addd system-groovy
Added support for system-groovy files
build-needs-workspace for flow to support build-flow 0.12
README
Update README.rst
Update README.rst
Update README.rst
Added maven option for jdk
Update builders.py
Added variable swapping module

Change-Id: I75afe4dd0eeb42f2c6369986af210d9a8f3e01f8