Fix kitchen test

Change-Id: I193af8b11146dd06413f199e456c47da554aaae5
diff --git a/tests/pillar/system.sls b/tests/pillar/system.sls
index c97fb21..8d34cc6 100644
--- a/tests/pillar/system.sls
+++ b/tests/pillar/system.sls
@@ -59,7 +59,7 @@
         full_name: Salt Sudo User2
         home: /home/saltuser2
     group:
-      test:
+      testgroup:
         enabled: true
         name: test
         gid: 9999