C populate refactor

Refactored rake db:populate to only create 50 users and 50 vendors that each have an activity with 3 activity times. 
Refactored Factories to confirm users and create users through the vendor and person create call properly. Fixed rspec and rails Factory calls to use the new factories.

All tests passing now!
Style nitpick: please reserve the `{...}` Ruby block syntax for single line blocks, otherwise use `do...end`.

Just as a heads up, (here is a good resource)[https://github.com/bbatsov/ruby-style-guide] for general style guidelines agreed upon by the Ruby community.