Support external Keystone in Monasca

Make it easy to override the Keystone endpoints to support deploying
stand-alone Monasca which can integrate with an externally provided
Keystone instance.

Partially-Implements: blueprint monasca-roles
Change-Id: I9ae3b243c792ef88075702b47b62f164a1705c2e

ansible/roles/monasca/templates/monasca-agent-forwarder/agent-forwarder.yml.j2

@@ -4,7 +4,7 @@ Api:
   region_name: {{ openstack_region_name }}
   username: {{ monasca_agent_user }}
   password: {{ monasca_agent_password }}
-  keystone_url: {{ admin_protocol }}://{{ kolla_internal_fqdn }}:{{ keystone_admin_port }}/v3
+  keystone_url: {{ keystone_admin_url }}
   user_domain_name: Default
   project_name: {{ monasca_control_plane_project }}
   project_domain_id: {{ default_project_domain_id }}

ansible/roles/monasca/templates/monasca-api/api.conf.j2

@@ -27,8 +27,8 @@ read_only_authorized_roles = {{ monasca_read_only_authorized_roles|join(', ') }}
 delegate_authorized_roles = {{ monasca_delegate_authorized_roles|join(', ') }}
 
 [keystone_authtoken]
-www_authenticate_uri = {{ internal_protocol }}://{{ kolla_internal_fqdn }}:{{ keystone_public_port }}
-auth_url = {{ admin_protocol }}://{{ kolla_internal_fqdn }}:{{ keystone_admin_port }}
+www_authenticate_uri = {{ keystone_internal_url }}
+auth_url = {{ keystone_admin_url }}
 auth_type = password
 project_domain_id = {{ default_project_domain_id }}
 user_domain_id = {{ default_user_domain_id }}

ansible/roles/monasca/templates/monasca-log-api/log-api.conf.j2

@@ -27,8 +27,8 @@ agent_roles = {{ monasca_agent_authorized_roles|join(', ') }}
 delegate_roles = {{ monasca_delegate_authorized_roles|join(', ') }}
 
 [keystone_authtoken]
-www_authenticate_uri = {{ internal_protocol }}://{{ kolla_internal_fqdn }}:{{ keystone_public_port }}
-auth_url = {{ admin_protocol }}://{{ kolla_internal_fqdn }}:{{ keystone_admin_port }}
+www_authenticate_uri = {{ keystone_internal_url }}
+auth_url = {{ keystone_admin_url }}
 auth_type = password
 project_domain_id =  {{ default_project_domain_id }}
 user_domain_id =  {{ default_user_domain_id }}