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: I3a1dfe1041a342f7ac10c244519dda2f51abbb9e

.gitreview

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

README.rst

@@ -5,13 +5,13 @@ Development Kayobe Configuration
 This repository provides development configuration for the `Kayobe
 <https://kayobe.readthedocs.io/en/latest>`__ project. It is based on the
 configuration provided by the `kayobe-config
-<https://git.openstack.org/cgit/openstack/kayobe-config>`__ repository, and
+<https://opendev.org/x/kayobe-config>`__ repository, and
 provides a set of configuration suitable for a development or test environment.
 It is used by default in the `Kayobe development environment
 <https://kayobe.readthedocs.io/en/latest/development/index.html>`__, and also
 in the Kayobe Continuous Integration (CI) deployment jobs.
 
 * Kayobe documentation: https://kayobe.readthedocs.io/en/latest/
-* Source: https://git.openstack.org/cgit/openstack/kayobe-config-dev
+* Source: https://opendev.org/x/kayobe-config-dev
 * Bugs: https://storyboard.openstack.org/#!/project/openstack/kayobe-config-dev
 * 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]