order included spaces by created_at

- ensures a consistent experience for users and tests 😊

[#174502491](https://www.pivotaltracker.com/story/show/174502491)

Co-authored-by: Tim Downey <tdowney@vmware.com>
Co-authored-by: Connor Braa <cbraa@pivotal.io>

Author: tcdowney

app/decorators/include_space_decorator.rb

@@ -8,7 +8,7 @@ def match?(include)
       def decorate(hash, resources)
         hash[:included] ||= {}
         space_guids = resources.map(&:space_guid).uniq
-        spaces = Space.where(guid: space_guids)
+        spaces = Space.where(guid: space_guids).order(:created_at)
 
         hash[:included][:spaces] = spaces.map { |space| Presenters::V3::SpacePresenter.new(space).to_hash }
         hash

spec/request/routes_spec.rb

@@ -6,8 +6,8 @@
 RSpec.describe 'Routes Request' do
   let(:user) { VCAP::CloudController::User.make }
   let(:admin_header) { admin_headers_for(user) }
-  let!(:space) { VCAP::CloudController::Space.make(name: 'a-space') }
-  let!(:org) { space.organization }
+  let!(:org) { VCAP::CloudController::Organization.make(created_at: 1.hour.ago) }
+  let!(:space) { VCAP::CloudController::Space.make(name: 'a-space', created_at: 1.hour.ago, organization: org) }
 
   let(:space_json_generator) do
     lambda { |s|