Add owner concern

I'm not 100% sure about this implementation, but it address support for disabling users and resources they own without deleting them. 
Did you want the splat operator * instead?

** is failing on [jruby 1.9 mode](https://travis-ci.org/zooniverse/Panoptes/jobs/27086096) with 
```
SyntaxError: /home/travis/build/zooniverse/Panoptes/app/models/concerns/owner.rb:10: syntax error, unexpected tPOW
          has_many properties_type, **attributes
```