Chore: Move to centos8-builder

Issue-ID: CIMAN-33
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
Change-Id: Id4f2abbd93855f85361b90b58416c0cf39af6fa8
diff --git a/jjb/optf/optf-osdf.yaml b/jjb/optf/optf-osdf.yaml
index e57a5ea..36bd06b 100644
--- a/jjb/optf/optf-osdf.yaml
+++ b/jjb/optf/optf-osdf.yaml
@@ -22,7 +22,7 @@
           build-node: ubuntu1804-docker-8c-8g
       - gerrit-maven-stage:
           sign-artifacts: true
-          build-node: centos7-docker-8c-8g
+          build-node: centos8-docker-8c-8g
           maven-versions-plugin: true
       - '{project-name}-gerrit-release-jobs':
           build-node: centos7-docker-8c-8g