Chore: Move stage jobs back to Centos7

Centos8 builder has issues with SIGUL
We need to fix those first or use a different node

Issue-ID: CIMAN-33
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
Change-Id: I0ecf9aab3579611cf0de7841d3bef820b8baa601
diff --git a/jjb/ccsdk/ccsdk-oran.yaml b/jjb/ccsdk/ccsdk-oran.yaml
index 1627a3e..0f9b104 100644
--- a/jjb/ccsdk/ccsdk-oran.yaml
+++ b/jjb/ccsdk/ccsdk-oran.yaml
@@ -9,7 +9,7 @@
           cron: '@daily'
           mvn-params: '-Dmaven.test.skip=true'
       - gerrit-maven-stage:
-          build-node: centos8-builder-4c-4g
+          build-node: centos7-builder-4c-4g
           sign-artifacts: true
           mvn-params: '-Dmaven.test.skip=true'
           mvn-opts: '-Ddocker.skip=true'