PowerTools repo is no longer included in delorean-deps.repo and we
should explicitly enable the repository to pull some required package
like SDL2.
This patch adds step to enable the repo into openstack-integration as
a short-term workaround, but this logic will be migrated to
puppet-openstack_extras later.
Related-Bug: #1907323
Change-Id: Ia21daac1e91e214dc28400779143774e6e69fc62
(cherry picked from commit 86a6821dd5)