Update CCSDK, SDNC CSIT to use mvn 3.8

Update CCSDK and SDNC CSIT jobs to use maven 3.8, required for
OpenDaylight Sulfur release

Issue-ID: CIMAN-421
Signed-off-by: Dan Timoney <dtimoney@att.com>
Change-Id: Ib39163703e7ecca7aa2e22ea97cf7928d9f8d5f9
diff --git a/jjb/sdnc/sdnc-csit.yaml b/jjb/sdnc/sdnc-csit.yaml
index 989853f..55ae34d 100644
--- a/jjb/sdnc/sdnc-csit.yaml
+++ b/jjb/sdnc/sdnc-csit.yaml
@@ -20,5 +20,6 @@
       - 'jakarta':
           branch: 'jakarta'
     mvn-settings: 'sdnc-oam-settings'
+    mvn-version: 'mvn38'
     robot-options: ''
     branch: 'master'