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

Thorough replacement of git.openstack.org URLs with their opendev.org counterparts.

Change-Id: Id6768e790fbcf4e73cde4e479e0f31ed5e1a9b8d
Closes-Bug: #1826041

README.rst

@@ -9,5 +9,5 @@ It contains the tempest plugin for the functional testing of Mistral Project.
 * Free software: Apache license
 * Documentation: https://docs.openstack.org/mistral/latest
 * Release notes: https://docs.openstack.org/releasenotes/mistral/
-* Source: https://git.openstack.org/cgit/openstack/mistral-tempest-plugin
+* Source: https://opendev.org/openstack/mistral-tempest-plugin
 * Bugs: https://bugs.launchpad.net/mistral

doc/source/installation.rst

@@ -8,6 +8,6 @@ the same environment where Tempest is installed.
 
 At the command line::
 
-    $ git clone https://git.openstack.org/cgit/openstack/mistral-tempest-plugin
+    $ git clone https://opendev.org/openstack/mistral-tempest-plugin
     $ cd mistral-tempest-plugin/
     $ pip install -e .

setup.cfg

@@ -5,7 +5,7 @@ description-file =
     README.rst
 author = OpenStack
 author-email = openstack-discuss@lists.openstack.org
-home-page = https://git.openstack.org/cgit/openstack/mistral-tempest-plugin
+home-page = https://opendev.org/openstack/mistral-tempest-plugin
 classifier =
     Environment :: OpenStack
     Intended Audience :: Information Technology

tox.ini

@@ -5,7 +5,7 @@ skipsdist = True
 
 [testenv]
 usedevelop = True
-install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt} {opts} {packages}
+install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt} {opts} {packages}
 setenv =
    VIRTUAL_ENV={envdir}
    PYTHONWARNINGS=default::DeprecationWarning