Switch from port to dport in site.yml
Switch from port to dport in site.yml

port is reserved in ansible

Change-Id: I87842857514e8fb589e565ece83552418a93c550
Signed-off-by: Cédric Ollivier <d48310251a4a484d041bc5d09a9ac4d86d20f793@orange.com>

opnfv/functest,opnfv/functest