Use octavia account instead of admin in octavia

Closes-Bug: #1719503
Change-Id: I705de11614f2d086bd123ea5b3841f59b5a24666

ansible/roles/octavia/tasks/register.yml

@@ -32,3 +32,15 @@
     module_extra_vars:
       openstack_octavia_auth: "{{ openstack_octavia_auth }}"
   run_once: True
+
+- name: Adding octavia user into admin project
+  kolla_toolbox:
+    module_name: "os_user_role"
+    module_args:
+      user: "{{ octavia_keystone_user }}"
+      role: admin
+      project: admin
+      auth: "{{ '{{ openstack_octavia_auth }}' }}"
+    module_extra_vars:
+      openstack_octavia_auth: "{{ openstack_octavia_auth }}"
+  run_once: True

ansible/roles/octavia/templates/octavia.conf.j2

@@ -26,8 +26,8 @@ max_retries = -1
 [service_auth]
 auth_url = {{ internal_protocol }}://{{ kolla_internal_fqdn }}:{{ keystone_admin_port }}
 auth_type = password
-username = {{ openstack_auth.username }}
-password = {{ keystone_admin_password }}
+username = {{ octavia_keystone_user }}
+password = {{ octavia_keystone_password }}
 user_domain_name = {{ default_user_domain_name }}
 project_name = {{ openstack_auth.project_name }}
 project_domain_name = {{ default_project_domain_name }}