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: Id330e14d38196d45a35150d5148a8afebe2b5798

bootstrap.sh

@@ -61,7 +61,7 @@ then
     -m clonemap.yaml \
     --cache-dir /opt/git \
     --workspace /home/jenkins/workspace/ \
-    git://git.openstack.org \
+    https://git.openstack.org \
     $cookbook_projects && \
     sudo chown -R jenkins:jenkins /home/jenkins/workspace && \
     sudo mkdir -p /home/jenkins/.chef && \