Combining event streams for dashboard and getting rid of unused column

I don't think this is a good test. It just tests that the stubs are hooked up correctly.  Instead, I'd suggest
```ruby
let(:activity) { double }
let(:user) { FactoryGirl.create(:user) }
before { sign_in user }
expect(user).to receive(:get_user_activity).and_return(activity)
expect(assigns(:activity)).to eq activity
```