Add new JJB template that builds in docker, exports files
then pushes packages to PackageCloud.io.
Define default values for account, repo and distributions.
Reuse packagecloud-push.sh script created by suresh channamallu.
Add new merge+push job to projects that build DEB/RPM packages.
Signed-off-by: Lott, Christopher (cl778h) <cl778h@att.com>
Change-Id: I8365ce8b37427692f8c6c436e87bd767bfa996c7