Create new 2.0.x branch in puppet-agent from master
Create new CI pipeline for puppet-agent "2.0.x" branch.
CI for Branch should have promotion disabled - but will be promoting into PE Glisan
Ensure the new branch appears in the agent-platform-triage view on jenkins-master-prod-1 so that waylon will includes that in the build radiator.
The current plan is to keep these around until until Agent 1.9.0 / Puppet 4.9.0 ship, after which the jobs can be deleted (master will then track 2.0.x).