run_tests: install selinux tools
run_tests: install selinux tools

SElinux tools will be useful for us to provide SElinux alerts reports
during our CI jobs.

Change-Id: Icce81078d91bbed12b9dbba3c53416476d594a09

openstack/puppet-openstack-integration,openstack/puppet-openstack-integration,openstack/puppet-openstack-integration