change kubernetes to hyperkube

Change-Id: I7c3892ebee4c0ccb334960d8864a956b9c480259
diff --git a/tests/pillar/pool_cluster.sls b/tests/pillar/pool_cluster.sls
index b792326..d58a25d 100644
--- a/tests/pillar/pool_cluster.sls
+++ b/tests/pillar/pool_cluster.sls
@@ -44,3 +44,5 @@
           port: 4001
         - host: 127.0.0.1
           port: 4001
+    hyperkube:
+      hash: hnsj0XqABgrSww7Nqo7UVTSZLJUt2XRd