Retire ara-{server,clients,plugins} repos: they've been merged to ara

These three repositories were folded back into a single feature/1.0
branch of the openstack/ara project.
The use case for keeping them separate doesn't justify the additional
management and maintenance overhead.

Change-Id: If75e3ad50eb3cebe315d5da855324d42ae0fd3c9

gerrit/projects.yaml

@@ -1421,11 +1421,8 @@
   description: ARA records Ansible Playbook runs and provides intuitive interfaces
     to browse them
 - project: openstack/ara-clients
-  use-storyboard: true
-  groups:
-    - ara
-  description: Client interfaces, modules and libraries for ARA Records Ansible
-  acl-config: /home/gerrit2/acls/openstack/ara.config
+  description: RETIRED, this project was merged into a single ara repository
+  acl-config: /home/gerrit2/acls/openstack/retired.config
 - project: openstack/ara-infra
   use-storyboard: true
   groups:
@@ -1433,17 +1430,11 @@
   description: Common integration and infrastructure code for the different ARA projects
   acl-config: /home/gerrit2/acls/openstack/ara.config
 - project: openstack/ara-plugins
-  use-storyboard: true
-  groups:
-    - ara
-  description: Plugins, modules and callbacks for ARA Records Ansible
-  acl-config: /home/gerrit2/acls/openstack/ara.config
+  description: RETIRED, this project was merged into a single ara repository
+  acl-config: /home/gerrit2/acls/openstack/retired.config
 - project: openstack/ara-server
-  use-storyboard: true
-  groups:
-    - ara
-  description: Server, backend, models and API for ARA Records Ansible
-  acl-config: /home/gerrit2/acls/openstack/ara.config
+  description: RETIRED, this project was merged into a single ara repository
+  acl-config: /home/gerrit2/acls/openstack/retired.config
 - project: openstack/ara-web
   use-storyboard: true
   groups:

gerritbot/channels.yaml

@@ -15,10 +15,7 @@ ara:
   projects:
     - openstack/ansible-role-ara
     - openstack/ara
-    - openstack/ara-clients
     - openstack/ara-infra
-    - openstack/ara-plugins
-    - openstack/ara-server
     - openstack/ara-web
   branches:
     - master

zuul.d/projects.yaml

@@ -2251,21 +2251,6 @@
         - openstack-tox-py35:
             branches: ^master
 
-- project:
-    name: openstack/ara-clients
-    templates:
-      - noop-jobs
-
-- project:
-    name: openstack/ara-plugins
-    templates:
-      - noop-jobs
-
-- project:
-    name: openstack/ara-server
-    templates:
-      - noop-jobs
-
 - project:
     name: openstack/arch-wg
     check:

zuul/main.yaml

@@ -331,10 +331,7 @@
           - openstack/apmec
           - openstack/apmec-horizon
           - openstack/ara
-          - openstack/ara-clients
           - openstack/ara-infra
-          - openstack/ara-plugins
-          - openstack/ara-server
           - openstack/ara-web
           - openstack/arch-design
           - openstack/arch-wg