Set maven version to 3.5 for ccsdk/distribution

After ODL Neon port, ccsdk/distribution repo requires mvn version >= 3.5.

Change-Id: I59368fc79022e5bef53d17baa53d6ee635b64efa
Issue-ID: CIMAN-295
Signed-off-by: Timoney, Dan (dt5972) <dtimoney@att.com>
diff --git a/jjb/ccsdk/distribution.yaml b/jjb/ccsdk/distribution.yaml
index bc20a16..0857b38 100644
--- a/jjb/ccsdk/distribution.yaml
+++ b/jjb/ccsdk/distribution.yaml
@@ -25,6 +25,7 @@
     mvn-settings: 'ccsdk-distribution-settings'
     files: '**'
     archive-artifacts: ''
+    maven-version: "mvn35"
     docker-pom: 'pom.xml'
     mvn-profile: docker
     build-node: ubuntu1604-docker-8c-8g