Use usual method to retrieve CI/CD stage statuses

app/models/ci/stage.rb

@@ -10,7 +10,7 @@ module Ci
     belongs_to :project
     belongs_to :pipeline
 
-    has_many :commit_statuses, foreign_key: :stage_id
+    has_many :statuses, class_name: 'CommitStatus', foreign_key: :stage_id
     has_many :builds, foreign_key: :stage_id
 
     validates :project, presence: true, unless: :importing?
@@ -50,7 +50,7 @@ module Ci
 
     def update_status
       retry_optimistic_lock(self) do
-        case commit_statuses.latest.status
+        case statuses.latest.status
         when 'pending' then enqueue
         when 'running' then run
         when 'success' then succeed

spec/factories/ci/stages.rb

@@ -17,7 +17,7 @@ FactoryGirl.define do
   end
 
   factory :ci_stage_entity, class: Ci::Stage do
-    project factory: :empty_project
+    project factory: :project
     pipeline factory: :ci_empty_pipeline
 
     name 'test'

spec/lib/gitlab/import_export/all_models.yml

@@ -119,7 +119,7 @@ pipeline_variables:
 stages:
 - project
 - pipeline
-- commit_statuses
+- statuses
 - builds
 statuses:
 - project

spec/models/ci/stage_spec.rb

@@ -9,9 +9,9 @@ describe Ci::Stage, :models do
       create(:commit_status, stage_id: stage.id)
     end
 
-    describe '#commit_statuses' do
+    describe '#statuses' do
       it 'returns all commit statuses' do
-        expect(stage.commit_statuses.count).to be 2
+        expect(stage.statuses.count).to be 2
       end
     end