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: Id6575b342e75058c00fd41041549277bbc1894aa

doc/source/configuration/configuring.rst

@@ -178,7 +178,7 @@ You can easily generate and update a sample configuration file
 named :ref:`watcher.conf.sample <watcher_sample_configuration_files>` by using
 these following commands::
 
-    $ git clone git://git.openstack.org/openstack/watcher
+    $ git clone https://git.openstack.org/openstack/watcher
     $ cd watcher/
     $ tox -e genconfig
     $ vi etc/watcher/watcher.conf.sample

doc/source/contributor/devstack.rst

@@ -19,7 +19,7 @@ model. To enable the Watcher plugin with DevStack, add the following to the
 `[[local|localrc]]` section of your controller's `local.conf` to enable the
 Watcher plugin::
 
-    enable_plugin watcher git://git.openstack.org/openstack/watcher
+    enable_plugin watcher https://git.openstack.org/openstack/watcher
 
 For more detailed instructions, see `Detailed DevStack Instructions`_. Check
 out the `DevStack documentation`_ for more information regarding DevStack.