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
2 files changed