Optimize CI/CD build retry service specs

spec/services/ci/retry_build_service_spec.rb

 require 'spec_helper'
 
 describe Ci::RetryBuildService do
-  let(:user) { create(:user) }
-  let(:project) { create(:project) }
-  let(:pipeline) { create(:ci_pipeline, project: project) }
+  set(:user) { create(:user) }
+  set(:project) { create(:project) }
+  set(:pipeline) { create(:ci_pipeline, project: project) }
+
   let(:build) { create(:ci_build, pipeline: pipeline) }
 
   let(:service) do
@@ -37,7 +38,7 @@ describe Ci::RetryBuildService do
              :queued, :coverage, :tags, :allowed_to_fail, :on_tag,
              :triggered, :trace, :teardown_environment,
              description: 'my-job', stage: 'test',  pipeline: pipeline,
-             auto_canceled_by: create(:ci_empty_pipeline)) do |build|
+             auto_canceled_by: create(:ci_empty_pipeline, project: project)) do |build|
                ##
                # TODO, workaround for FactoryGirl limitation when having both
                # stage (text) and stage_id (integer) columns in the table.