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

Change-Id: Idd169dc8dbe07a17cbdf3e0834ccf3998badcfb2
Closes-Bug: #1826999

README.rst

@@ -25,7 +25,7 @@ the `specification`_ which created this library.
 
 * Free software: Apache license
 * Documentation: https://docs.openstack.org/oslo.privsep/latest/
-* Source: https://git.openstack.org/cgit/openstack/oslo.privsep
+* Source: https://opendev.org/openstack/oslo.privsep
 * Bugs: https://bugs.launchpad.net/oslo.privsep
 * Release Notes: https://docs.openstack.org/releasenotes/oslo.privsep
 

tox.ini

@@ -7,7 +7,7 @@ install_command = pip install {opts} {packages}
 whitelist_externals =
  /bin/sh
 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}