[CORD-2460]
Update and fix build documentation, fix variables with new TOSCA engine

Change-Id: I21b5e3aa2abda0111a72d1a994140ab2894296ce
diff --git a/roles/test-exampleservice/defaults/main.yml b/roles/test-exampleservice/defaults/main.yml
index 8079f10..16d838e 100644
--- a/roles/test-exampleservice/defaults/main.yml
+++ b/roles/test-exampleservice/defaults/main.yml
@@ -15,16 +15,12 @@
 
 # test-exampleservice/defaults/main.yml
 
-head_cord_profile_dir: "/opt/cord_profile"
-
-xos_ui_port: 9000
-
 xos_tosca_url: "http://xos-tosca/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') }}"
+head_cord_profile_dir: "/opt/cord_profile"
 
-maas_xos_admin_pass: "{{ lookup('file', '/opt/credentials/xosadmin@opencord.org') }}"
+xos_admin_user: "xosadmin@opencord.org"
+head_xos_admin_pass: "{{ lookup('file', head_credentials_dir ~ '/' ~ xos_admin_user) }}"