Replace all Ubuntu 16.04 with Ubuntu18.04 image
Change-Id: I86b84957145f7c1f253d3158e42e015c322788eb
diff --git a/jjb/verify/bbsim-sadis-server.yaml b/jjb/verify/bbsim-sadis-server.yaml
index 0cc823b..0f095e5 100644
--- a/jjb/verify/bbsim-sadis-server.yaml
+++ b/jjb/verify/bbsim-sadis-server.yaml
@@ -23,7 +23,7 @@
- 'tag-collision-reject':
dependency-jobs: 'verify_bbsim-sadis-server_licensed'
- 'make-unit-test':
- build-node: 'ubuntu16.04-basebuild-1c-2g'
+ build-node: 'ubuntu18.04-basebuild-1c-2g'
dest-gopath: "github.com/opencord"
unit-test-targets: 'lint sca test'
unit-test-keep-going: 'true'