Add tempest-cleanup ansible role

The patch adds a new ansible role called tempest-cleanup which will
allow us to test tempest cleanup in the gate jobs.

Change-Id: I2cef2da6fee13e622da07b890da88850fe420152
diff --git a/roles/tempest-cleanup/defaults/main.yaml b/roles/tempest-cleanup/defaults/main.yaml
new file mode 100644
index 0000000..fc1948a
--- /dev/null
+++ b/roles/tempest-cleanup/defaults/main.yaml
@@ -0,0 +1,3 @@
+devstack_base_dir: /opt/stack
+init_saved_state: false
+dry_run: false