[ci] Update repos and packages for centos/8/build_base_machine.sh

[ci] Update repos and packages for centos/8/build_base_machine.sh

Issue found blocking the daily container build, due to the PowerTools
repos being renamed, and dpdk version being incorrect.

https: //build.opnfv.org/ci/view/barometer/job/barometer-collectd-latest-docker-build-push-master/11/console
https: //build.opnfv.org/ci/view/barometer/job/barometer-collectd-latest-docker-build-push-jerma/3/console
https: //build.opnfv.org/ci/view/barometer/job/barometer-collectd-experimental-docker-build-push-master/25/console
https: //build.opnfv.org/ci/view/barometer/job/barometer-collectd-experimental-docker-build-push-jerma/3/console
https: //build.opnfv.org/ci/view/barometer/job/barometer-collectd-docker-build-push-master/117/console
https: //build.opnfv.org/ci/view/barometer/job/barometer-collectd-docker-build-push-jerma/3/console
Change-Id: Ied653a940f91dcfac32dc23fe17585d385a0275a
Signed-off-by: Emma Foley <efoley@redhat.com>