Build upf-epc images with more resources

Change-Id: If0c0205dfeaefb48d73a6ac29a26aca2387e84c9
diff --git a/jjb/omec-ci.yaml b/jjb/omec-ci.yaml
index 16618ff..580fdb0 100644
--- a/jjb/omec-ci.yaml
+++ b/jjb/omec-ci.yaml
@@ -193,6 +193,7 @@
       - 'docker-publish-github':
           build-timeout: 30
           docker-repo: 'omecproject'
+          build-node: 'ubuntu16.04-basebuild-2c-4g'
 
 # Combined pipeline
 - job-template: