[CORD-2874]
Fix deprecation warnings raised by Ansible 2.5

Change-Id: Icb607d267af2771b046b46399ce5f0d182f629ab
diff --git a/roles/test-client-install/tasks/main.yml b/roles/test-client-install/tasks/main.yml
index dd4f467..ffae72e 100644
--- a/roles/test-client-install/tasks/main.yml
+++ b/roles/test-client-install/tasks/main.yml
@@ -62,7 +62,7 @@
     name: testclient
     state: stopped
   register: result
-  until: result | success
+  until: result is success
   retries: 3
   delay: 10