fix test for osd

Change-Id: Ia15c2191fcb1dab5113aa9233d8112a9728c7ea8
diff --git a/tests/pillar/ceph_osd_single.sls b/tests/pillar/ceph_osd_single.sls
index 16c4036..f039bbc 100644
--- a/tests/pillar/ceph_osd_single.sls
+++ b/tests/pillar/ceph_osd_single.sls
@@ -29,6 +29,7 @@
     enabled: true
     version: kraken
     host_id: 10
+    crush_parent: rack01
     copy_admin_key: true
     journal_type: raw
     dmcrypt: disable