Added missing cleanup-images in setup.cfg

The destroy playbook calls the cleanup-images script.  All other
scripts related to destroy were in setup.cfg while cleanup-images
was missing.

TrivialFix

Change-Id: I3d5dc435d03aded9e8b415dda8435b5e1c5ec937

setup.cfg

@@ -28,6 +28,7 @@ data_files =
     share/kolla/tools = tools/validate-docker-execute.sh
     share/kolla/tools = tools/cleanup-containers
     share/kolla/tools = tools/cleanup-host
+    share/kolla/tools = tools/cleanup-images
     share/kolla/doc = doc/*
     share/kolla/etc_examples = etc/*
     share/kolla = tools/init-runonce