Add wait task to ensure sentinel is running

deployment/ansible-role-sentinel/tasks/deploy.yml

@@ -88,5 +88,8 @@
 - name: ensure guide page is up
   uri: url=http://127.0.0.1/guide/index.html
 
+- name: wait up to 5 mins for sentinel to run on port 8080
+  wait_for: host=127.0.0.1 port=8080
+
 - name: ensure api-docs page is up
   uri: url=http://127.0.0.1/api-docs