Do not use bindmounts for nfs tests

This commit removes bindmounting
of host directories to containers in play-resources tests.
It seems that it is unneeded, and it is enough to just create anonymous volumes
instead of cluttering host filesystem.
This is one part of a preparation for removing the cleanup-directories
role that won't be needed anymore.
Note: similar changes were made to the nfs
role tests, for the same reasons, but
cleanup-directories is not used there

Change-Id: Ib33543427d72b4bc7ede532e5eb9a5023931f1fe
Issue-ID: OOM-1902
Signed-off-by: Michal Zegan <m.zegan@samsung.com>
diff --git a/ansible/test/play-resources/molecule/nfs/molecule.yml b/ansible/test/play-resources/molecule/nfs/molecule.yml
index ffaabb0..9cff6b8 100644
--- a/ansible/test/play-resources/molecule/nfs/molecule.yml
+++ b/ansible/test/play-resources/molecule/nfs/molecule.yml
@@ -13,7 +13,7 @@
     override_command: false
     volumes:
       - /sys/fs/cgroup:/sys/fs/cgroup:ro
-      - ${HOME}/data:/data:rw  # mount fs from host to get nfs exportfs task working
+      - /data
     groups:
       - resources
     networks: