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/tools/install_pip.sh b/tools/install_pip.sh
index 1bd7392..2b6aa4c 100755
--- a/tools/install_pip.sh
+++ b/tools/install_pip.sh
@@ -35,7 +35,7 @@
 # done by openstack-infra diskimage-builder elements as part of image
 # preparation [1].  This prevents any network access, which can be
 # unreliable in CI situations.
-# [1] http://git.openstack.org/cgit/openstack-infra/project-config/tree/nodepool/elements/cache-devstack/source-repository-pip
+# [1] https://opendev.org/openstack/project-config/src/branch/master/nodepool/elements/cache-devstack/source-repository-pip
 
 PIP_GET_PIP_URL=${PIP_GET_PIP_URL:-"https://bootstrap.pypa.io/get-pip.py"}
 LOCAL_PIP="$FILES/$(basename $PIP_GET_PIP_URL)"