CORD-2684 fixing xos-ready role as "tosca available" retries werent taking place

Change-Id: Ie8a2f643d47114e7a27db295ffd3359cb31efa68
diff --git a/roles/xos-ready/tasks/main.yml b/roles/xos-ready/tasks/main.yml
index 147367c..534932d 100644
--- a/roles/xos-ready/tasks/main.yml
+++ b/roles/xos-ready/tasks/main.yml
@@ -31,6 +31,8 @@
     url: "{{ xos_tosca_url }}"
     method: GET
     status_code: 200
+    return_content: yes
+  register: xosready_tosca
+  until: xosready_tosca.status == 200
   retries: 40
   delay: 15
-