Migrate to Ubuntu18.04

Migrate to Ubuntu18.04 and deprecate
old unused images ubuntu1604-builder-2c-1g
ubuntu1604-builder-4c-2g

Change-Id: I11a772c5e3f45aa54de7a719651838f1fa638057
Issue-ID: CIMAN-373
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
diff --git a/jjb/sdc/sdc-dcae-d-fe.yaml b/jjb/sdc/sdc-dcae-d-fe.yaml
index 3923a15..f5693cb 100644
--- a/jjb/sdc/sdc-dcae-d-fe.yaml
+++ b/jjb/sdc/sdc-dcae-d-fe.yaml
@@ -2,7 +2,7 @@
 - project:
     name: sdc-dcae-d-fe
     project-name: 'sdc-dcae-d-fe'
-    build-node: ubuntu1604-builder-4c-2g
+    build-node: ubuntu1804-builder-4c-4g
     jobs:
       - '{project-name}-{stream}-verify-java'
       - '{project-name}-{stream}-merge-java'
@@ -72,7 +72,7 @@
     nexus-iq-namespace: 'onap-'
     project: sdc/dcae-d/fe
     project-name: 'sdc-dcae-d-fe'
-    build-node: ubuntu1604-builder-4c-2g
+    build-node: ubuntu1804-builder-4c-4g
     branch: 'master'
     mvn-settings: 'sdc-dcae-d-fe-settings'