Improve name of service that stops CI environments

app/services/after_branch_delete_service.rb

@@ -16,7 +16,7 @@ def execute(branch_name)
   private
   def stop_environments
-    Ci::StopEnvironmentService
+    Ci::StopEnvironmentsService
       .new(project, current_user)
       .execute(branch_name)
   end

app/services/ci/stop_environment_service.rb → app/services/ci/stop_environments_service.rb

 module Ci
-  class StopEnvironmentService < BaseService
+  class StopEnvironmentsService < BaseService
     attr_reader :ref
     def execute(branch_name)

spec/services/ci/stop_environment_service_spec.rb → spec/services/ci/stop_environments_service_spec.rb

 require 'spec_helper'
-describe Ci::StopEnvironmentService, services: true do
+describe Ci::StopEnvironmentsService, services: true do
   let(:project) { create(:project, :private) }
   let(:user) { create(:user) }