ansible: fix clean env code
ansible: fix clean env code

Fix the cleaning playbook.

Change-Id: I635ab28fb483ff2d757ee9806446d1194ce3510d
Signed-off-by: Simone Tiraboschi <cb03129c66ba4da7ba7044049d0f43907bf857bb@redhat.com>

oVirt/ovirt-hosted-engine-setup,oVirt/ovirt-hosted-engine-setup