[Testing] Automated integration testing?

[fernviridian]

Currently workflow for testing is:

1. Build image on internal CI system
2. Push image to private registry
3. Pull image on testing rancher instance
4. Manually poking and prodding
5. Once good, submit PR and merge to master
6. Docker hub build triggers
7. Image available publicly

This is mostly a placeholder issue while I come up with better testing system. This does not include actual code testing, but more for integration between rancher-lets-encrypt and the Rancher API.