Upgrade some policy repos to 18.04

These 4 repos compile fine in an ubuntu VM so they are
safe to be upgraded.

drools-pdp hangs, apex fails, engine cannot bind, and
distribution fails. They will need further reviews to
determine if its simply a VM configuration error or
a ubuntu issue (highly doubtful).

Issue-ID: POLICY-2437
Change-Id: I9ff155bd44b49de10b7b49143fbd85e59f5464ae
Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>
diff --git a/jjb/policy/policy-api.yaml b/jjb/policy/policy-api.yaml
index 534e476..4c4c47d 100644
--- a/jjb/policy/policy-api.yaml
+++ b/jjb/policy/policy-api.yaml
@@ -7,13 +7,13 @@
       - '{project-name}-{stream}-merge-java':
           docker-pom: 'pom.xml'
           mvn-params: '-P docker'
-          build-node: ubuntu1604-docker-8c-8g
+          build-node: ubuntu1804-docker-8c-8g
       - gerrit-maven-stage:
           sign-artifacts: true
           build-node: centos7-builder-4c-4g
           maven-versions-plugin: true
       - gerrit-maven-docker-stage:
-          build-node: ubuntu1604-docker-8c-8g
+          build-node: ubuntu1804-docker-8c-8g
           maven-versions-plugin: true
           mvn-params: '-P docker -Dmaven.test.skip=true'
           container-public-registry: 'nexus3.onap.org:10001'
@@ -29,7 +29,7 @@
     java-version: openjdk11
     files: '**'
     archive-artifacts: ''
-    build-node: ubuntu1604-builder-4c-4g
+    build-node: ubuntu1804-builder-4c-4g
 
 - project:
     name: policy-api-sonar
@@ -41,7 +41,7 @@
     sonarcloud-project-key: '{sonarcloud_project_organization}_{project-name}'
     sonar-mvn-goal: '{sonar_mvn_goal}'
     cron: '@daily'
-    build-node: ubuntu1604-builder-4c-4g
+    build-node: ubuntu1804-builder-4c-4g
     project: 'policy/api'
     project-name: 'policy-api'
     branch: 'master'