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/music/music-prom.yaml b/jjb/music/music-prom.yaml
index 295a49e..58f1ba0 100644
--- a/jjb/music/music-prom.yaml
+++ b/jjb/music/music-prom.yaml
@@ -24,7 +24,7 @@
     mvn-settings: 'music-prom-settings'
     files: '**'
     archive-artifacts: ''
-    build-node: ubuntu1604-builder-4c-4g
+    build-node: ubuntu1804-builder-4c-4g
 
 
 - project: