Add Zuulv3 native jobs for the dummy driver

- Split the existing "manila-tempest-minimal-dsvm-dummy"
  functional job into two jobs:
  * manila-tempest-plugin-dummy-no-dhss (DHSS=False)
  * manila-tempest-plugin-dummy-dhss (DHSS=True
  to take advantage of the zuul and tempest ansible
  roles available to us.
- Base these new jobs on a minimal devstack, that only
  runs manila and keystone and no other OpenStack services.
  This makes these tests run really fast, coupled
  with the fact that they're running against a no-op
  driver.
- Introduce a role to copy tempest configuration
  after orchestrating devstack because devstack's
  "test-config" hook [1] misbehaves when the base
  services are not enabled.

Depends-On: I4fd282673074887cada729b6e4491ee493e230cc
Change-Id: I4c9f552e6a495b3d3f9dd63c1657ea40a3f9033b
Signed-off-by: Goutham Pacha Ravi <gouthampravi@gmail.com>
diff --git a/roles/set-tempest-config/tasks/main.yml b/roles/set-tempest-config/tasks/main.yml
new file mode 100644
index 0000000..3572ff5
--- /dev/null
+++ b/roles/set-tempest-config/tasks/main.yml
@@ -0,0 +1,14 @@
+- name: Install required pip packages
+  pip:
+    name: devstack-tools
+    state: "latest"
+    virtualenv: /var/tmp/venv
+
+- name: Copy tempest config
+  shell: >-
+    . /var/tmp/venv/bin/activate && \
+    dsconf extract {{ devstack_local_conf_path }} \
+      test-config \
+      '$TEMPEST_CONFIG' \
+      {{ devstack_base_dir }}/tempest/etc/tempest.conf
+  become: yes