Fix: Change so-java17 job to mvn38, centos8

Change-Id: I484c545b085959823b82e193d023ca0a60f7925b
Issue-ID: CIMAN-33
Signed-off-by: Eric Ball <eball@linuxfoundation.org>
diff --git a/jjb/so/so.yaml b/jjb/so/so.yaml
index 4acef67..7cc80b6 100644
--- a/jjb/so/so.yaml
+++ b/jjb/so/so.yaml
@@ -36,10 +36,8 @@
       - "java17":
           branch: "java17"
           java-version: openjdk17
-          gerrit-maven-stage:
-            build-node: centos8-docker-8c-8g
-          gerrit-maven-docker-stage:
-            build-node: centos8-docker-8c-8g
+          build-node: centos8-docker-8c-8g
+          maven-version: mvn38
     mvn-settings: "so-settings"
     files: "**"
     archive-artifacts: ""