Fixes bug when spec/spec.ops missing
Fixes bug when spec/spec.ops missing

Previous code would cause the issue:
````
rake aborted!
No such file or directory - spec/spec.opts
```

Now the opts will be empty, and the rake will run as expected.
puppetlabs/rspec-puppet,glauco/rspec-puppet,tuxmea/rspec-puppet,johnmccabe/rspec-puppet,rbramwell/rspec-puppet,jeremy-asher/rspec-puppet,electrical/rspec-puppet,DavidS/rspec-puppet,rodjek/rspec-puppet,fitpay/rspec-puppet,iankronquist/rspec-puppet