vgithub: dedup the list of status returned by the /status REST calls
vgithub: dedup the list of status returned by the /status REST calls

Seems that GitHub keep the history of all states of all status ever assigned
to the given refs.

Signed-off-by: Thomas Gazagnaire <5f50a84c1fa3bcff146405017f36aec1a10a9e38@gazagnaire.org>

docker/datakit,docker/datakit,docker/datakit