Follow opendev rebranding

Change-Id: If01eacca0a3f209a5fa2b684224107495aa6595a

README.rst

@@ -36,7 +36,7 @@ Developers wishing to work on renderspec should always base
 their work on the latest code, available from the master GIT
 repository at:
 
-   https://git.openstack.org/cgit/openstack/renderspec
+   https://opendev.org/openstack/renderspec
 
 Developers should also join the discussion on the mailing list,
 at:

doc/source/index.rst

@@ -25,13 +25,13 @@ is using ``tox``. To run the testsuite for python 2.7, do:
 
 Contributing
 ============
-Code is hosted at `git.openstack.org`_. Submit bugs to the
+Code is hosted at `opendev.org`_. Submit bugs to the
 renderspec project on `Launchpad`_. Submit code to the
 openstack/renderspec project using `Gerrit`_.
 
-.. _git.openstack.org: https://git.openstack.org/cgit/openstack/renderspec
+.. _opendev.org: https://opendev.org/openstack/renderspec
 .. _Launchpad: https://launchpad.net/renderspec
-.. _Gerrit: http://docs.openstack.org/infra/manual/developers.html#development-workflow
+.. _Gerrit: https://docs.openstack.org/infra/manual/developers.html#development-workflow
 
 
 Indices and tables

tox.ini

@@ -11,7 +11,7 @@ setenv = VIRTUAL_ENV={envdir}
          OS_STDERR_NOCAPTURE=False
          PYTHONHASHSEED=0
 deps =
-        -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+       -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands = stestr run {posargs}