Add missing association for mock_ci_service

app/models/project.rb

@@ -113,6 +113,7 @@ class Project < ActiveRecord::Base
   has_one :gitlab_issue_tracker_service, dependent: :destroy, inverse_of: :project
   has_one :external_wiki_service, dependent: :destroy
   has_one :kubernetes_service, dependent: :destroy, inverse_of: :project
+  has_one :mock_ci_service, dependent: :destroy
 
   has_one  :forked_project_link,  dependent: :destroy, foreign_key: "forked_to_project_id"
   has_one  :forked_from_project,  through:   :forked_project_link

spec/lib/gitlab/import_export/all_models.yml

@@ -153,6 +153,7 @@ project:
 - gitlab_issue_tracker_service
 - external_wiki_service
 - kubernetes_service
+- mock_ci_service
 - forked_project_link
 - forked_from_project
 - forked_project_links