Chore: Move to centos8-builder

Chore: Move to centos8-builder

jjb/testsuite/testsuite.yaml
jjb/usecaseui/usecase-ui-intent-analysis.yaml
jjb/usecaseui/usecase-ui-nlp.yaml
jjb/usecaseui/usecase-ui-server.yaml
jjb/usecaseui/usecase-ui.yaml
jjb/vfc/vfc-gvnfm-vnflcm-java.yaml
jjb/vfc/vfc-gvnfm-vnfmgr-java.yaml
jjb/vfc/vfc-gvnfm-vnfres-java.yaml
jjb/vfc/vfc-nfvo-db.yaml
jjb/vfc/vfc-nfvo-driver-svnfm-huawei.yaml
jjb/vfc/vfc-nfvo-driver-vnfm-gvnfm-java.yaml
jjb/vfc/vfc-nfvo-driver-vnfm-svnfm-root.yaml
jjb/vfc/vfc-nfvo-driver-vnfm-svnfm-zte-java.yaml
jjb/vfc/vfc-nfvo-lcm-java.yaml
jjb/vnfrqts/vnfrqts-epics.yaml

Issue-ID: CIMAN-33
Signed-off-by: Bengt Thuree <bthuree@linuxfoundation.org>
Change-Id: I30443b5195bd75b0763b7a026c7e8494b09701fc