Rename Project.datadog_service to datadog_integration

Rename datadog_service association to datadog_integration

app/models/integration.rb

@@ -43,6 +43,7 @@ class Integration < ApplicationRecord
     asana assembla
     bamboo bugzilla buildkite
     campfire confluence custom_issue_tracker
+    datadog
   ].to_set.freeze
 
   serialize :properties, JSON # rubocop:disable Cop/ActiveRecordSerialize

app/models/project.rb

@@ -155,7 +155,7 @@ class Project < ApplicationRecord
   has_one :campfire_integration, class_name: 'Integrations::Campfire'
   has_one :confluence_integration, class_name: 'Integrations::Confluence'
   has_one :custom_issue_tracker_integration, class_name: 'Integrations::CustomIssueTracker'
-  has_one :datadog_service, class_name: 'Integrations::Datadog'
+  has_one :datadog_integration, class_name: 'Integrations::Datadog'
   has_one :discord_service, class_name: 'Integrations::Discord'
   has_one :drone_ci_service, class_name: 'Integrations::DroneCi'
   has_one :emails_on_push_service, class_name: 'Integrations::EmailsOnPush'

spec/lib/gitlab/import_export/all_models.yml

@@ -363,7 +363,7 @@ project:
 - integrations
 - campfire_integration
 - confluence_integration
-- datadog_service
+- datadog_integration
 - discord_service
 - drone_ci_service
 - emails_on_push_service

spec/models/project_spec.rb

@@ -46,7 +46,7 @@ RSpec.describe Project, factory_default: :keep do
     it { is_expected.to have_one(:asana_integration) }
     it { is_expected.to have_many(:boards) }
     it { is_expected.to have_one(:campfire_integration) }
-    it { is_expected.to have_one(:datadog_service) }
+    it { is_expected.to have_one(:datadog_integration) }
     it { is_expected.to have_one(:discord_service) }
     it { is_expected.to have_one(:drone_ci_service) }
     it { is_expected.to have_one(:emails_on_push_service) }