puppet/tripleo: IRC channels cleanup
puppet/tripleo: IRC channels cleanup

- Puppet OpenStack
  - remove Liberty and Juno that are EOL.
  - Remove puppet-tripleo, which is already on #tripleo channel.
- TripleO: remove liberty EOL branch.

Change-Id: I5a4b306e585da1c9aeca27c51a1e35a1f8abd4b7

openstack-infra/project-config,Tesora/tesora-project-config,Tesora/tesora-project-config,openstack-infra/project-config