Contact model changes (#184)

* move source id from contacts

* Fix contactInbox model name

* rubocop fix

* Fix rspec

spec/factories/contacts.rb

@@ -5,8 +5,6 @@ FactoryBot.define do
     sequence(:name) { |n| "Widget #{n}" }
     sequence(:email) { |n| "widget-#{n}@example.com" }
     phone_number { '+123456789011' }
-    source_id { rand(100) }
     account
-    inbox
   end
 end

spec/models/contact_spec.rb

@@ -5,12 +5,10 @@ require 'rails_helper'
 RSpec.describe Contact do
   context 'validations' do
     it { is_expected.to validate_presence_of(:account_id) }
-    it { is_expected.to validate_presence_of(:inbox_id) }
   end
 
   context 'associations' do
     it { is_expected.to belong_to(:account) }
-    it { is_expected.to belong_to(:inbox) }
     it { is_expected.to have_many(:conversations).dependent(:destroy) }
   end