Replace git.openstack.org URLs with opendev.org URLs

Change-Id: Ife085fd9a36d96b00c43ced290c1d761a782d03f

README.rst

@@ -7,15 +7,15 @@ Team and repository tags
 
 .. Change things from this point on
 
-=======================================================
- oslotest -- OpenStack Testing Framework and Utilities
-=======================================================
+=====================================================
+oslotest -- OpenStack Testing Framework and Utilities
+=====================================================
 
 The Oslo Test framework provides common fixtures, support for debugging, and
 better support for mocking results.
 
 * Free software: Apache license
 * Documentation: https://docs.openstack.org/oslotest/latest/
-* Source: https://git.openstack.org/cgit/openstack/oslotest
+* Source: https://opendev.org/openstack/oslotest
 * Bugs: https://bugs.launchpad.net/oslotest
 * Release notes: https://docs.openstack.org/releasenotes/oslotest

doc/source/user/cross-testing.rst

@@ -31,7 +31,7 @@ For example::
 
   $ mkdir -p ~/repos/openstack
   $ cd ~/repos/openstack
-  $ git clone https://git.openstack.org/openstack/oslo-incubator
+  $ git clone https://opendev.org/openstack/oslo-incubator
   $ cd ~/repos
   $ ./openstack/oslo-incubator/tools/clone_openstack.sh
 

tox.ini

@@ -6,7 +6,7 @@ envlist = py36,py27,pep8
 [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
   -r{toxinidir}/requirements.txt
 commands = stestr run --slowest {posargs}