CORD-2117 configure exampleservice using new tosca engine

Change-Id: I211ffb9eb85dcf58c9eeab5b7a5669fb9877a169
(cherry picked from commit dfca35fc14c30f4692b44a874f39ac3060f39505)
diff --git a/roles/test-exampleservice/defaults/main.yml b/roles/test-exampleservice/defaults/main.yml
index c6c615f..7e9c125 100644
--- a/roles/test-exampleservice/defaults/main.yml
+++ b/roles/test-exampleservice/defaults/main.yml
@@ -19,6 +19,12 @@
 
 xos_ui_port: 9000
 
+xos_tosca_host: "xos-tosca"
+
+head_credentials_dir: "/opt/credentials"
+
 xos_admin_user: "xosadmin@opencord.org"
+xos_admin_pass: "{{ lookup('password', head_credentials_dir ~ '/xosadmin@opencord.org chars=ascii_letters,digits') }}"
+
 maas_xos_admin_pass: "{{ lookup('file', '/opt/credentials/xosadmin@opencord.org') }}"