Provide Ubuntu 18.04 builder in CI

Multicloud-k8s's KUD rebased base platform from ubuntu16.04 to
ubuntu18.04. In order to provide aligned CI, this change provides
u18.04-based slave in jenkins CI.

Issue-ID: MULTICLOUD-957
Signed-off-by: Konrad Bańka <k.banka@samsung.com>
Change-Id: I609ae8a9150c03504332b6069cc16921d4c8254b
1 file changed