Add cleanup master job back in CI

Change-Id: Ic079f4e18cfa20ce48457012ca0e502e84e72af1
diff --git a/jjb/airship/projects.yml b/jjb/airship/projects.yml
index 052c188..f978d9f 100644
--- a/jjb/airship/projects.yml
+++ b/jjb/airship/projects.yml
@@ -114,6 +114,17 @@
     - feature_tests_upgrade_ubuntu
 
 - project:
+    name: 'metal3io_project_infra_cleanup'
+    ci_github_whitelist_org:
+    - nordix-airship
+    repo:
+      org: "metal3-io"
+      name: "project-infra"
+    ci_github_pipeline: 'jenkins/jobs/integration_tests_clean.pipeline'
+    jobs:
+    - master_clean
+
+- project:
     name: "metal3io_bmo"
     repo:
       org: "metal3-io"