oslo-incubator Launchpad project is now (correctly) called
oslo-incubator, so we don't need to special-case it anymore.
Change-Id: I0834877779f8fa37ea419d1531da5e96734eaec8
RC milestones need to use a specific code name ("RC1"). This change
makes sure create_milestones.py sets the right code name for RC
milestone creation.
Also fixes wrong comment on the sample yaml file.
Change-Id: Ie8e7b5942a02706c7c2b03c2d680c23ae85edef6
Support the creation of the series if it doesn't exist already and
the --createseries argument is passed. Status of the newly-created
series is set to "Future".
Additionally update the sample YAML file with icehouse projects.