Refactor the BulkImportService

It's better to have feature specific logic scoped under their own
namespaces instead of the root namespace. So here we're moving:
BulkImportService to BulkImports::CreateService.

I also intend to create other services for the BulkImports. For intance,
the BulkImports::StatusService

app/controllers/import/bulk_imports_controller.rb

@@ -37,7 +37,7 @@ class Import::BulkImportsController < ApplicationController
   end
 
   def create
-    response = BulkImportService.new(current_user, create_params, credentials).execute
+    response = ::BulkImports::CreateService.new(current_user, create_params, credentials).execute
 
     if response.success?
       render json: response.payload.to_json(only: [:id])

app/services/bulk_import_service.rb → app/services/bulk_imports/create_service.rb

@@ -23,9 +23,10 @@
 # - For each group to be imported (BulkImport::Entity.with_status(:created))
 #   - Import the group data
 #   - Create entities for each subgroup of the imported group
-#   - Enqueue a BulkImportService job (Pn) to import the new entities (subgroups)
+#   - Enqueue a BulkImports::CreateService job (Pn) to import the new entities (subgroups)
 #
-class BulkImportService
+module BulkImports
+  class CreateService
     attr_reader :current_user, :params, :credentials
 
     def initialize(current_user, params, credentials)
@@ -67,4 +68,5 @@ class BulkImportService
         bulk_import
       end
     end
+  end
 end

lib/api/bulk_imports.rb

@@ -51,7 +51,7 @@ module API
         end
       end
       post do
-        response = BulkImportService.new(
+        response = ::BulkImports::CreateService.new(
           current_user,
           params[:entities],
           url: params[:configuration][:url],

spec/controllers/import/bulk_imports_controller_spec.rb

@@ -199,9 +199,9 @@ RSpec.describe Import::BulkImportsController do
           session[:bulk_import_gitlab_url] = instance_url
         end
 
-        it 'executes BulkImportService' do
+        it 'executes BulkImpors::CreatetService' do
           expect_next_instance_of(
-            BulkImportService, user, bulk_import_params, { url: instance_url, access_token: pat }) do |service|
+            ::BulkImports::CreateService, user, bulk_import_params, { url: instance_url, access_token: pat }) do |service|
             allow(service).to receive(:execute).and_return(ServiceResponse.success(payload: bulk_import))
           end
 
@@ -214,7 +214,7 @@ RSpec.describe Import::BulkImportsController do
         it 'returns error when validation fails' do
           error_response = ServiceResponse.error(message: 'Record invalid', http_status: :unprocessable_entity)
           expect_next_instance_of(
-            BulkImportService, user, bulk_import_params, { url: instance_url, access_token: pat }) do |service|
+            ::BulkImports::CreateService, user, bulk_import_params, { url: instance_url, access_token: pat }) do |service|
             allow(service).to receive(:execute).and_return(error_response)
           end
 

spec/services/bulk_import_service_spec.rb → spec/services/bulk_imports/create_service_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe BulkImportService do
+RSpec.describe BulkImports::CreateService do
   let(:user) { create(:user) }
   let(:credentials) { { url: 'http://gitlab.example', access_token: 'token' } }
   let(:params) do