add ironic-image PR build test jobs

Change-Id: I19af350869bbf279b1a61c636a9489e3152c7795
diff --git a/jjb/metal3/projects.yml b/jjb/metal3/projects.yml
index 692d6ad..c4bc5af 100644
--- a/jjb/metal3/projects.yml
+++ b/jjb/metal3/projects.yml
@@ -268,3 +268,17 @@
                 capm3_version: v1alpha5
                 capm3_branch: release-0.5
                 schedule: "H 23 * * *"
+
+
+- project:
+    name: 'ironic_image_build_tests'
+    org: metal3-io
+    proj:
+      - project_infra:
+          repo: project-infra
+          branch: '${{ghprbActualCommit}}'
+          ci_github_repo: '${{ghprbAuthorRepoGitUrl}}'
+      - ironic_image:
+          repo: ironic-image
+    jobs:
+      - ironic_image_build_tests