Fix c3po docker build

Change-Id: I76214e654467f7c2bd64ed13ad97ebf699eb59db
diff --git a/jjb/omec-ci.yaml b/jjb/omec-ci.yaml
index fb0ce6c..4b2cdca 100644
--- a/jjb/omec-ci.yaml
+++ b/jjb/omec-ci.yaml
@@ -90,7 +90,7 @@
       - 'docker-publish-github':
           build-timeout: 30
           docker-repo: 'omecproject'
-          build-node: 'ubuntu16.04-basebuild-1c-2g'
+          build-node: 'ubuntu16.04-basebuild-8c-15g'
 
 # for openmme
 - project: