Fix missing usage of openstack_integration::apache

This patch fixes openstack_integration::apache still missing in beaker
tests, to avoid failures in CentOS8 beaker job.

Change-Id: I3f87fa90944d467997cc9cf34a0942179836d0f1

spec/acceptance/default_domain_spec.rb

@@ -3,6 +3,7 @@ require 'spec_helper_acceptance'
 describe 'basic keystone server with changed domain id' do
   after(:context) do
     clean_up_manifest = <<-EOM
+      include openstack_integration::apache
       include openstack_integration::keystone
 
       keystone_config { 'identity/default_domain_id': ensure => absent}

spec/acceptance/keystone_wsgi_apache_spec.rb

@@ -314,6 +314,7 @@ EOC
       context 'manifest' do
         let(:pp) do
       <<-EOM
+      include openstack_integration::apache
       class { 'openstack_integration::keystone':
         default_domain      => 'default_domain',
         using_domain_config => true,