Improve nfs role

This commit improves the nfs role by
using cluster_ip variable instead of ansible_host for getting
nfs client/server address, and
using /etc/exports.d instead of /etc/exports for
exporting nfs filesystem.
Also, this commit fixes other
issues in molecule found along the way.

Change-Id: Ibd4ea5d4fd937116e2dc9e1b6f85c3e019f62e17
Issue-ID: OOM-1770
Signed-off-by: Michal Zegan <m.zegan@samsung.com>
diff --git a/ansible/test/roles/cleanup-nfs/tasks/main.yml b/ansible/test/roles/cleanup-nfs/tasks/main.yml
new file mode 100644
index 0000000..e0ca4a4
--- /dev/null
+++ b/ansible/test/roles/cleanup-nfs/tasks/main.yml
@@ -0,0 +1,5 @@
+- name: "Unmount /dockerdata-nfs if mounted"
+  ignore_errors: true
+  mount:
+    path: /dockerdata-nfs
+    state: unmounted