added specs for associations, included modules and used shoulda instead of expect syntax (#1747)
added specs for associations, included modules and used shoulda instead of expect syntax (#1747)

* added specs for associations, included modules and used shoulda instead of expect syntax

* removed duplicate spec and used include? instead for testing for truthy value in included module spec for user

* added specs for scopes - mail_receiver, allow_to_display

* changed should syntax to is_expected.to

diraulo/WebsiteOne,diraulo/WebsiteOne,diraulo/WebsiteOne,diraulo/WebsiteOne