Update (git|review).openstack.org links to opendev

This updates links going to git.openstack.org and review.openstack.org
to go to their respective opendev locations to avoid redirects.

Change-Id: I78e3bb5303718962f591117f9c0ee11f2314b128
Closes-Bug: #1833256
diff --git a/HACKING.rst b/HACKING.rst
index 968306a..f695106 100644
--- a/HACKING.rst
+++ b/HACKING.rst
@@ -11,7 +11,7 @@
 set up and interact with OpenStack components.
 
 DevStack's official repository is located on git.openstack.org at
-https://git.openstack.org/openstack-dev/devstack.  Besides the master branch that
+https://opendev.org/openstack/devstack.  Besides the master branch that
 tracks the OpenStack trunk branches a separate branch is maintained for all
 OpenStack releases starting with Diablo (stable/diablo).
 
@@ -26,7 +26,7 @@
 .. _lp: https://launchpad.net/~devstack
 
 The `Gerrit review
-queue <https://review.openstack.org/#/q/project:openstack-dev/devstack,n,z>`__
+queue <https://review.opendev.org/#/q/project:openstack/devstack>`__
 is used for all commits.
 
 The primary script in DevStack is ``stack.sh``, which performs the bulk of the