Switch to keystonercv3 in OS tests

Change-Id: Ie8c7ad7e5997f5744e263b068a3c6e68694b76aa
diff --git a/cvp_checks/tests/test_nova_services.py b/cvp_checks/tests/test_nova_services.py
index 84ca19b..8fdadd6 100644
--- a/cvp_checks/tests/test_nova_services.py
+++ b/cvp_checks/tests/test_nova_services.py
@@ -5,7 +5,7 @@
     result = local_salt_client.cmd(
         'keystone:server',
         'cmd.run',
-        ['. /root/keystonerc; nova service-list | grep "down\|disabled" | grep -v "Forced down"'],
+        ['. /root/keystonercv3; nova service-list | grep "down\|disabled" | grep -v "Forced down"'],
         expr_form='pillar')
 
     if not result: