Change url from http to https in local.conf.sample
Change url from http to https in local.conf.sample

Like document in magnum and else, the protocol of git is https.
So change it from http to https.

Change-Id: Ie291aab8ea0d262346ab7248e901070fa18cfca9
Closes-Bug: #1526592
midonet/kuryr,celebdor/kuryr,midonet/kuryr,openstack/kuryr,openstack/kuryr,celebdor/kuryr-libnetwork,midonet/kuryr,celebdor/kuryr-libnetwork,celebdor/kuryr,celebdor/kuryr-libnetwork