Phases/osbuild: support passing 'customizations' for image builds

The osbuild Koji plugin supports passing customizations for an image
build. This is also supported in the Koji CLI plugin. Some teams want to
pass image customizations for images built as part of Pungi composes.
Extend the osbuild phase to support passing customizations in the Pungi
configuration.

Merges: https://pagure.io/pungi/pull-request/1733
Signed-off-by: Tomáš Hozza <thozza@redhat.com>

pungi/phases/osbuild.py

@@ -159,6 +159,10 @@ class RunOSBuildThread(WorkerThread):
         if upload_options:
             opts["upload_options"] = upload_options
 
+        customizations = config.get("customizations")
+        if customizations:
+            opts["customizations"] = customizations
+
         if release:
             opts["release"] = release
         task_id = koji.koji_proxy.osbuildImage(