Implement sponsor feature and add adiitonal scenarios for earlier features

Part of PT story https://www.pivotaltracker.com/story/show/76232594

- add more tests to admin users feature
- add additional scenario to partner featue
- added sponsor feature 
- fix delete links being show for sponsors by active admin
- added linked name to sponsor index view
- refactored authenticated user step into background
The sequence is generated per province [check here](https://github.com/AgileVentures/osra/blob/develop/app/models/partner.rb#L14). So it will be 12002. I played around a bit with testing it in rspec but the Province factory was running out of valid values. I'm sure that can worked around.

I'm not sure which is a better place for it. Having it here simulates what the client will test by hand when we ask them to accept the story. Having it in rspec seems like we are testing the functionality of the sequenced gem.