src: ansible: extra_vars default value is an empty dictionary
src: ansible: extra_vars default value is an empty dictionary

Change-Id: I70ea137099658ee6d528d9a96396dc8718a791ee
Signed-off-by: Ido Rosenzwig <d3cf649376f7b9625b3012cf4ff65bcb09ba1a88@redhat.com>

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