Awood/gutterball rpm

Run with:

```
$ mock -r candlepin-1-rhel-6-x86_64 --install BREW_LINKS_TO_MONGO
$ tito build --test --builder mock --arg mock=candlepin-1-rhel-6-x86_64 --arg speedup --rpm

$ mock -r candlepin-1-rhel-7-x86_64 --install BREW_LINKS_TO_MONGO
$ tito build --test --builder mock --arg mock=candlepin-1-rhel-7-x86_64 --arg speedup --rpm
```

Or whatever the names of your Mock configs for Candlepin 6 and 7 are.

Nice!