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

Change-Id: I1032668072bb65d4fb31a31c4949b555b317155d

README.rst

@@ -23,7 +23,7 @@ Release notes for the project can be found at:
   https://docs.openstack.org/releasenotes/openstack-ansible-openstack_hosts/
 
 The project source code repository is located at:
-  https://git.openstack.org/cgit/openstack/openstack-ansible-openstack_hosts/
+  https://opendev.org/openstack/openstack-ansible-openstack_hosts/
 
 The project home is at:
   https://launchpad.net/openstack-ansible

tests/ansible-role-requirements.yml

@@ -1,9 +1,9 @@
 ---
 - name: apt_package_pinning
-  src: https://git.openstack.org/openstack/openstack-ansible-apt_package_pinning
+  src: https://opendev.org/openstack/openstack-ansible-apt_package_pinning
   scm: git
   version: master
 - name: pip_install
-  src: https://git.openstack.org/openstack/openstack-ansible-pip_install
+  src: https://opendev.org/openstack/openstack-ansible-pip_install
   scm: git
   version: master

tox.ini

@@ -7,7 +7,7 @@ envlist = docs,linters,functional
 [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}
+    pip install -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master} {opts} {packages}
 commands =
     /usr/bin/find . -type f -name "*.pyc" -delete
 passenv =