Add services for testing based on test repo name

Rather than have to define a job per non-aio service, we have
zuul introspect the origin test repo and add the service name
to the scenario variable on the fly. This allows us to simplify
our job definitions and simply use the AIO job template for all
repositories.

Change-Id: I592d51171ecef5e30c54e71bf4c00d96787bce36

zuul.d/playbooks/run.yml

@@ -1,5 +1,31 @@
 - hosts: all
+  vars:
+    scenario_map:
+      aodh: telemetry
+      ceilometer: telemetry
+      gnocchi: telemetry
+      horizon: lxc
   tasks:
+    - name: Dynamically determine additional scenario elements
+      when:
+        - zuul.project.short_name is match("^openstack-ansible-os_(.*)$")
+        - (dynamic_scenario | default(True)) | bool
+      block:
+        - name: Set service_name
+          set_fact:
+            service_name: "{{ zuul.project.short_name | regex_replace('^openstack-ansible-os_(.*)$', '\\1') }}"
+
+        - name: Set scenario_suffix
+          set_fact:
+            scenario_suffix: "{{ scenario_map[service_name] | default(service_name) }}"
+
+        # Horizon's apache uses the same ip:port combinations as
+        # the repo server's nginx service. As such, we force the
+        # use of containers to ensure that they do not conflict.
+        - name: Add services based on test repo name
+          set_fact:
+            scenario: "{{ (service_name == 'horizon') | ternary(scenario | regex_replace('_metal', ''), scenario) }}_{{ scenario_suffix }}"
+
     - name: Run gate-check-commit.sh script
       become: yes
       become_user: root