Fixing typo
tiny bug fix for hieradata creating script
This change includes several small changes to configure github
replication from gerrit.

The gerrit module now adds github to the ssh known_hosts/
Replication and project keys are now generated with the other keys.
Altered the replication list in the openstack_project module for
review.
Added place holder to hiera common.yaml templace for the zuul
ssh public key contents. Site.pp should now be passing that string
to the gerrit python tools module.
Configuration for zuul user and repo