Chore: Move to centos8-builder

Chore: Move to centos8-builder

jjb/ccsdk/distribution.yaml
jjb/ccsdk/features.yaml
jjb/ccsdk/parent.yaml
jjb/ccsdk/sli.yaml
jjb/ci-management/ci-management-packer-jobs.yaml
jjb/ci-management/ci-management.yaml
jjb/cli/cli.yaml
jjb/cps/cps-cps-tbdmt.yaml
jjb/cps/cps-cps-temporal.yaml
jjb/cps/cps-ncmp-dmi-plugin.yaml
jjb/cps/cps.yaml
jjb/dcaegen2/dcaegen2-analytics-flink.yaml
jjb/dcaegen2/dcaegen2-analytics-tca-gen2.yaml
jjb/dcaegen2/dcaegen2-analytics.yaml
jjb/dcaegen2/dcaegen2-collectors-datafile.yaml

Issue-ID: CIMAN-33
Signed-off-by: Bengt Thuree <bthuree@linuxfoundation.org>
Change-Id: I127498e1f427afc23e9cf4cb3f3fdd149deaface