Change default build node size to 4c x 4g for appc

appc is not able to cleanly build on a 2cx1g instance. Move up to the
next larger instance size.

Change-Id: Ib673ce0c652db603916dcd874eb01ce66c58a726
Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>
diff --git a/jjb/appc/appc-deployment.yaml b/jjb/appc/appc-deployment.yaml
index 71be09b..c33efdc 100644
--- a/jjb/appc/appc-deployment.yaml
+++ b/jjb/appc/appc-deployment.yaml
@@ -18,3 +18,4 @@
     archive-artifacts: ''
     docker-pom: 'pom.xml'
     mvn-profile: docker
+    build-node: ubuntu1604-basebuild-4c-4g
diff --git a/jjb/appc/appc.yaml b/jjb/appc/appc.yaml
index 8555f69..67cc3e9 100644
--- a/jjb/appc/appc.yaml
+++ b/jjb/appc/appc.yaml
@@ -15,3 +15,4 @@
     mvn-settings: 'appc-settings'
     files: '**'
     archive-artifacts: ''
+    build-node: ubuntu1604-basebuild-4c-4g