Replace openstack.org git:// URLs with https://

This is a mechanically generated change to replace openstack.org
git:// URLs with https:// equivalents.

This is in aid of a planned future move of the git hosting
infrastructure to a self-hosted instance of gitea (https://gitea.io),
which does not support the git wire protocol at this stage.

This update should result in no functional change.

For more information see the thread at

 http://lists.openstack.org/pipermail/openstack-discuss/2019-March/003825.html

Change-Id: I480c17e7357cf05532bc8949c5914227cbe04e2e

elements/os-svc-install/README.md

@@ -24,7 +24,7 @@ service will not be started automatically nor can it be manually started.
 ## example usage
 ```bash
 # clone nova, and install it and its dependencies to /opt/stack/venvs/nova
-os-svc-install -u nova -r git://git.openstack.org/openstack/nova.git
+os-svc-install -u nova -r https://git.openstack.org/openstack/nova.git
 
 # install a system-start script for nova-api
 os-svc-daemon -e 'foo=bar bar=baz' -n nova-api -u nova -c /opt/stack/venvs/nova/bin/nova-api -- --config-dir /etc/nova