175171411 — More test for  default User scope
175171411 — More test for  default User scope

### Changes
* increases test coverage for
User scopes.

After understandnig the default_scope for User, it seems to me that User.rb is fine with the Rails 4.1 default_scope behaviors.

'disabled' users just shouldn't show up anywhere.  This seems fine, and shouldn't break anything.

(Famous last words)

### More info:
https://guides.rubyonrails.org/upgrading_ruby_on_rails.html#changes-on-default-scopes

[#175171411]
https://www.pivotaltracker.com/story/show/175171411

concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse