upgrading node for voltha-unit-tests due to segmentaion fault error

Change-Id: Ic231b92e03510c5aa1191845ea7bf319f77edebd
diff --git a/jjb/voltha-unit-test.yaml b/jjb/voltha-unit-test.yaml
index d6bf304..22b4456 100644
--- a/jjb/voltha-unit-test.yaml
+++ b/jjb/voltha-unit-test.yaml
@@ -35,7 +35,7 @@
           choosing-strategy: gerrit
           jenkins-ssh-credential: '{jenkins-ssh-credential}'
 
-    node: 'ubuntu16.04-basebuild-2c-4g'
+    node: 'ubuntu16.04-basebuild-4c-8g'
     project-type: freestyle
     concurrent: true