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-zte-python.yaml b/jjb/vfc/vfc-nfvo-driver-vnfm-svnfm-zte-python.yaml
index 39d7eb8..5c77ac2 100644
--- a/jjb/vfc/vfc-nfvo-driver-vnfm-svnfm-zte-python.yaml
+++ b/jjb/vfc/vfc-nfvo-driver-vnfm-svnfm-zte-python.yaml
@@ -7,7 +7,7 @@
       - 'master':
           branch: 'master'
     mvn-settings: 'vfc-nfvo-driver-vnfm-svnfm-settings'
-    build-node: ubuntu1604-builder-4c-4g
+    build-node: ubuntu1804-builder-4c-4g
     subproject:
       - 'drv-vnfm-zte':
           path: 'zte/vmanager'