Add devstack base job for zuul v3

This should be managed in the devstack repo, since it's a base job to
run devstack.

Change-Id: Iffe54fbccbccd68db08f79a1b51dd7f76dbff408
Depends-On: Ie2119f24360d56690ffd772b95a9ea6b98dd4a39
diff --git a/roles/setup-tempest-user/README.rst b/roles/setup-tempest-user/README.rst
new file mode 100644
index 0000000..bb29c50
--- /dev/null
+++ b/roles/setup-tempest-user/README.rst
@@ -0,0 +1,10 @@
+Set up the `tempest` user
+
+Create the tempest user and allow it to sudo.
+
+**Role Variables**
+
+.. zuul:rolevar:: devstack_base_dir
+   :default: /opt/stack
+
+   The devstack base directory.