Modify docker role to use dind

This modifies the docker role to use dind.
Note that it now uses pepare-docker-dind role, but
*disables* start of docker.

Change-Id: I55ac8d1f69531ba7496c34f990818b894a7d02a5
Issue-ID: OOM-1864
Signed-off-by: Michal Zegan <m.zegan@samsung.com>
diff --git a/ansible/roles/docker/molecule/default/prepare.yml b/ansible/roles/docker/molecule/default/prepare.yml
index 8df759c..6bdde69 100644
--- a/ansible/roles/docker/molecule/default/prepare.yml
+++ b/ansible/roles/docker/molecule/default/prepare.yml
@@ -2,4 +2,6 @@
 - name: Prepare infra
   hosts: all
   roles:
-    - prepare-docker
+    - role: prepare-docker-dind
+      vars:
+        start_docker: false