add variables for cdhweb pre-production (new db name, same db user & password as cdhweb prod)
customize a few production-only steps to also run when runtime_env is preproduction
also includes logic to ensure deploy user uid is consistent (cherry-picked from #218)
Notes:
I've successfully run the playbook for the preproduction environment and have the cdh beta site working.
Making cdhweb_preproduction as child of production might have weird implications for cdhweb_production; I'm ok with this limitation since I only want these two to co-exist temporarily and plan to remove pre-prod and the old version of the site should be effectively frozen now
ref #219
also includes logic to ensure deploy user uid is consistent (cherry-picked from #218)
Notes: