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: I9fda4019c6b9f950a7349aad9b85a80af1fc5055

.zuul.yaml

@@ -37,7 +37,7 @@
     vars:
       tempest_concurrency: 4
       devstack_plugins:
-        neutron: git://git.openstack.org/openstack/neutron.git
+        neutron: https://git.openstack.org/openstack/neutron.git
       devstack_localrc:
         # TODO(sean-k-mooney) move all tempest jobs to py3 by default.
         # USE_PYTHON3: true

playbooks/os-vif-ovs/run.yaml

@@ -17,7 +17,7 @@
               dest: devstack-gate
           EOF
           /usr/zuul-env/bin/zuul-cloner -m clonemap.yaml --cache-dir /opt/git \
-              git://git.openstack.org \
+              https://git.openstack.org \
               openstack-infra/devstack-gate
         executable: /bin/bash
         chdir: '{{ ansible_user_dir }}/workspace'