pinning "role" to admin only

Change-Id: I97002fbecc8a986634e2356b4bcf42330ca8a26c
diff --git a/src/test/cord-api/Framework/utils/utils.py b/src/test/cord-api/Framework/utils/utils.py
index 4b769c9..773fa2c 100644
--- a/src/test/cord-api/Framework/utils/utils.py
+++ b/src/test/cord-api/Framework/utils/utils.py
@@ -289,7 +289,7 @@
         if value == 'float':
             return random.uniform(1,10)
         if value == 'role':
-            return random.choice(['admin', 'pi', 'tech', 'billing'])
+            return 'admin'
         if value == 'direction':
             return random.choice(['in', 'out'])
         if value == 'flavor':