Clean up temporary directories as root, host tests may have changed

ownership to root.

Author: maxstack

etc/kayobe/ansible/stackhpc-cloud-tests.yml

@@ -191,3 +191,5 @@
           loop:
             - "{{ repo_tmpdir.path }}"
             - "{{ results_tmpdir.path }}"
+          # Some files used by host tests may now be owned by root
+          become: true