Use 4c-8g node to build ngic-rtc docker images

Change-Id: Iaf4805552a3c7a6b2181b7f8b0b02937aca8e465
diff --git a/jjb/docker-publish-github.yaml b/jjb/docker-publish-github.yaml
index 148c228..6df76ec 100644
--- a/jjb/docker-publish-github.yaml
+++ b/jjb/docker-publish-github.yaml
@@ -27,7 +27,7 @@
     parameters:
       - string:
           name: buildNode
-          default: 'ubuntu16.04-basebuild-1c-2g'
+          default: '{build-node}'
           description: 'Name of the Jenkins node to run the job on'
 
       - string:
diff --git a/jjb/omec-ci.yaml b/jjb/omec-ci.yaml
index f2922c9..1e3eaf1 100644
--- a/jjb/omec-ci.yaml
+++ b/jjb/omec-ci.yaml
@@ -44,6 +44,7 @@
       - 'docker-publish-github':
           build-timeout: 30
           docker-repo: 'omecproject'
+          build-node: 'ubuntu16.04-basebuild-4c-8g'
 
 # for c3po
 - project:
@@ -76,6 +77,7 @@
       - 'docker-publish-github':
           build-timeout: 30
           docker-repo: 'omecproject'
+          build-node: 'ubuntu16.04-basebuild-1c-2g'
 
 # for openmme
 - project:
@@ -105,6 +107,7 @@
       - 'docker-publish-github':
           build-timeout: 30
           docker-repo: 'omecproject'
+          build-node: 'ubuntu16.04-basebuild-1c-2g'
 
 # for nucleus
 - project: