Migrate to ubuntu1804-builder

Migrate the rest of the jobs from
ubuntu1604-builder to ubuntu1804-builder
Remove unused nodes

Change-Id: Ic43c12d3f7f8952d3248085ec103806c9b442047
Issue-ID: CIMAN-373
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
diff --git a/jjb/logging-analytics/logging-analytics-pomba-pomba-sdc-context-builder.yaml b/jjb/logging-analytics/logging-analytics-pomba-pomba-sdc-context-builder.yaml
index 41855fc..331a7ef 100644
--- a/jjb/logging-analytics/logging-analytics-pomba-pomba-sdc-context-builder.yaml
+++ b/jjb/logging-analytics/logging-analytics-pomba-pomba-sdc-context-builder.yaml
@@ -24,7 +24,7 @@
     mvn-settings: logging-analytics-pomba-pomba-sdc-context-builder-settings
     files: '**'
     archive-artifacts: ''
-    build-node: ubuntu1604-builder-4c-4g
+    build-node: ubuntu1804-builder-4c-4g
     maven-version: 'mvn35'
 
 #- project:
@@ -55,7 +55,7 @@
     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: logging-analytics/pomba/pomba-sdc-context-builder
     project-name: logging-analytics-pomba-pomba-sdc-context-builder
     branch: master