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: I3011bb0d15304994dd3c732fa948ff63e2a8ccd7

metadata.json

@@ -4,7 +4,7 @@
   "author": "OpenStack CI",
   "summary": "Puppet module for Mailman",
   "license": "Apache 2.0",
-  "source": "git://git.openstack.org/openstack-infra/puppet-mailman.git",
+  "source": "https://git.openstack.org/openstack-infra/puppet-mailman.git",
   "project_page": "http://docs.openstack.org/infra/system-config/",
   "issues_url": "https://storyboard.openstack.org/#!/project/795",
   "dependencies": []

spec/acceptance/fixtures/multihost.pp

@@ -1,6 +1,6 @@
 vcsrepo { '/opt/system-config':
   ensure => present,
-  source => 'git://git.openstack.org/openstack-infra/system-config',
+  source => 'https://git.openstack.org/openstack-infra/system-config',
   provider => git,
 }
 file { '/srv/mailman/openstack/templates/en':