this catches up the openedx cert repo with some recent changes made to
the private one
configuration updates and changes to deprecate the old cert repo
adding cert-data.yml to replace the config in settings
adding utf-8 encoding for unicode in the yaml file
reducing loglevel so boto is less chatty
updating path for example-key-ownertrust
updating download_url formatting
Merge pull request #2 from edx/jarv/catch-up-openedx-certs

Jarv/catch up openedx certs