Fixing credentials dir in xos-config-new-tosca role

Change-Id: I24bb8f198a431975f89bafbcdeb0dc14b3326b81
(cherry picked from commit af66fbc5cd2f2783d972691edc7d7b00c72f4197)
diff --git a/roles/xos-config-new-tosca/defaults/main.yml b/roles/xos-config-new-tosca/defaults/main.yml
index 5b6a39a..1ead356 100644
--- a/roles/xos-config-new-tosca/defaults/main.yml
+++ b/roles/xos-config-new-tosca/defaults/main.yml
@@ -17,10 +17,10 @@
 
 # xos-config/defaults/main.yml
 
-credentials_dir: "{{ playbook_dir }}/credentials"
+head_credentials_dir: "/opt/credentials"
 
 xos_admin_user: "xosadmin@opencord.org"
-xos_admin_pass: "{{ lookup('password', credentials_dir ~ '/xosadmin@opencord.org chars=ascii_letters,digits') }}"
+xos_admin_pass: "{{ lookup('password', head_credentials_dir ~ '/xosadmin@opencord.org chars=ascii_letters,digits') }}"
 
 xos_tosca_config_templates: []