This adds e2e tests for #681, which asserts packages containing only
auto-generated files are added to the list of importable packages
when doing recursive package discovery.

Add e2e tests for issue #681

This commit will log an error message if unsupported config is being used. I have chosen not to cause mockery to return an error code because it's possible that configs using unsupported parameters are working just fine, so we don't want to break those users. Instead, the log message should hopefully get their attention, and the attention of anyone trying to migrate to packages. Also removed is the conditional used to enter into the `packages` code path. Previously it asserted that `Config.Name == ""` but this was causing more confusion than it needed to.

This fixes #685

Add error log for unsupported config