Rename for a more consistent pipeline worker name, feedback:

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6342/diffs#note_17039533

app/models/ci/pipeline.rb

@@ -85,7 +85,7 @@ module Ci
       after_transition any => [:success, :failed] do |pipeline|
         pipeline.run_after_commit do
-          SendPipelineNotificationWorker.perform_async(pipeline.id)
+          PipelineNotificationWorker.perform_async(pipeline.id)
         end
       end
     end

app/models/project_services/pipelines_email_service.rb

@@ -32,7 +32,7 @@ class PipelinesEmailService < Service
     return unless all_recipients.any?
     pipeline_id = data[:object_attributes][:id]
-    SendPipelineNotificationWorker.new.perform(pipeline_id, all_recipients)
+    PipelineNotificationWorker.new.perform(pipeline_id, all_recipients)
   end
   def can_test?

app/workers/send_pipeline_notification_worker.rb → app/workers/pipeline_notification_worker.rb

-class SendPipelineNotificationWorker
+class PipelineNotificationWorker
   include Sidekiq::Worker
   def perform(pipeline_id, recipients = nil)

spec/workers/send_pipeline_notification_worker_spec.rb → spec/workers/pipeline_notification_worker_spec.rb

 require 'spec_helper'
-describe SendPipelineNotificationWorker do
+describe PipelineNotificationWorker do
   let(:pipeline) do
     create(:ci_pipeline,
            project: project,