Update VFC to ubuntu 1804

Change-Id: I6bb4fe25dc3824f9f7dbbebdfa532f9b39a5c6ca
Issue-ID: VFC-1653
Signed-off-by: yangyan <yangyanyj@chinamobile.com>
diff --git a/jjb/vfc/vfc-nfvo-driver-vnfm-svnfm-root.yaml b/jjb/vfc/vfc-nfvo-driver-vnfm-svnfm-root.yaml
index 5ffc7f8..52aee73 100644
--- a/jjb/vfc/vfc-nfvo-driver-vnfm-svnfm-root.yaml
+++ b/jjb/vfc/vfc-nfvo-driver-vnfm-svnfm-root.yaml
@@ -21,7 +21,7 @@
           maven-versions-plugin: true
           mvn-params: '-P rootOnly'
     archive-artifacts: ''
-    build-node: ubuntu1604-builder-4c-4g
+    build-node: ubuntu1804-builder-4c-4g
 
 - project:
     name: vfc-nfvo-driver-svnfm-root-info