Update git.openstack.org to opendev.org

The project infrastructure is now hosted at opendev.org.

Kayobe projects have been moved from the openstack/ namespace to
x/.

Depends-On: https://review.opendev.org/655424
Change-Id: Ibf710984b421a4ca47f3bb827dc1648dfcd17f62

.gitreview

@@ -1,4 +1,4 @@
 [gerrit]
-host=review.openstack.org
+host=review.opendev.org
 port=29418
-project=openstack/kayobe-config.git
+project=x/kayobe-config.git

README.rst

@@ -3,7 +3,7 @@ Kayobe Configuration
 ====================
 
 This repository provides configuration for the `kayobe
-<https://github.com/openstack/kayobe>`_ project. It is intended to encourage
+<https://opendev.org/x/kayobe>`_ project. It is intended to encourage
 version control of site configuration.
 
 Kayobe enables deployment of containerised OpenStack to bare metal.
@@ -31,6 +31,6 @@ To this solid base, kayobe adds:
 All this and more, automated from top to bottom using Ansible.
 
 * Documentation: https://kayobe.readthedocs.io/en/latest/
-* Source: https://git.openstack.org/cgit/openstack/kayobe
+* Source: https://opendev.org/x/kayobe
 * Bugs: https://storyboard.openstack.org/#!/project/openstack/kayobe-config
 * IRC: #openstack-kayobe

tox.ini

@@ -6,7 +6,7 @@ skipsdist = True
 [testenv]
 install_command = pip install {opts} {packages}
 deps =
-    -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+    -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
     -r{toxinidir}/test-requirements.txt
 
 [testenv:pep8]