has_no_providers uses clear_providers, which uses rails destroy_all
Fixed passwords in logs for good

I hope!
Provider setup smarts move to utils.providers

Also, providers know if they exist now
Merge pull request #486 from psav/fix-passwords-for-good

Fixed passwords in logs for good
Merge pull request #482 from seandst/clean-has-no-providers

Clean has_no_providers, provider utils move