Set up gitea image provides and requires for gating

This should ensure that if we have a parent job that updates the gitea
version and a do not merge child job that induces an artificial failure
for zuul hold purposes that we test the correct image in the child job's
changes.

Prior to this we were testing the existing published images, but
provides + requires will give the correct signaling to make the desired
"test new proposed image" behavior happen in the child change builds.

Change-Id: Ie6b827b650e0f32606dc5ec7f4aa0adfeebdeb5e

zuul.d/docker-images/gitea.yaml

@@ -34,6 +34,7 @@
     name: system-config-build-image-gitea
     description: Build a gitea image.
     parent: system-config-build-image
+    provides: gitea-container-image
     vars: &gitea_vars
       docker_images:
         - context: docker/gitea
@@ -50,6 +51,7 @@
     name: system-config-upload-image-gitea
     description: Build and upload a gitea image.
     parent: system-config-upload-image
+    provides: gitea-container-image
     vars: *gitea_vars
     files: *gitea_files
 

zuul.d/docker-images/haproxy.yaml

@@ -4,6 +4,7 @@
     description: Build a haproxy-statsd image.
     parent: system-config-build-image
     requires: python-base-3.7-container-image
+    provides: haproxy-statsd-container-image
     vars: &haproxy-statsd_vars
       docker_images:
         - context: docker/haproxy-statsd
@@ -18,6 +19,7 @@
     description: Build and upload a haproxy-statsd image.
     parent: system-config-upload-image
     requires: python-base-3.7-container-image
+    provides: haproxy-statsd-container-image
     vars: *haproxy-statsd_vars
     files: *haproxy-statsd_files
 

zuul.d/system-config-run.yaml

@@ -529,6 +529,9 @@
     required-projects:
       - openstack/project-config
       - opendev/system-config
+    requires:
+      - gitea-container-image
+      - haproxy-statsd-container-image
     vars:
       run_playbooks:
         - playbooks/letsencrypt.yaml