Drop use of git.openstack.org

Our cgit instance will be going away and opendev.org is the new
preferred URL for browsing our git repos. Redirects will exist for the
foreseeable future, but it's more efficient to just go directly to the
new locations.

Change-Id: Ia84b464390dbbaaba4c87c4032f5fd21a529f412
Co-Authored-By: Vishal Manchanda <manchandavishal143@gmail.com>

README.rst

@@ -6,7 +6,7 @@ Heat dashboard is a horizon plugin for Heat.
 
 * License: Apache license
 * Documentation: https://docs.openstack.org/heat-dashboard/latest/
-* Source: https://git.openstack.org/cgit/openstack/heat-dashboard
+* Source: https://opendev.org/openstack/heat-dashboard
 * Bugs: https://storyboard.openstack.org/#!/project/openstack/heat-dashboard
 * Release Notes: https://docs.openstack.org/releasenotes/heat-dashboard
 

doc/source/contributor/contributing.rst

@@ -24,7 +24,7 @@ Bug tracker
     https://storyboard.openstack.org/#!/project/992
 
 Code Hosting
-    https://git.openstack.org/cgit/openstack/heat-dashboard
+    https://opendev.org/openstack/heat-dashboard/
 
 Code Review
-    https://review.openstack.org/#/q/status:open+project:openstack/heat-dashboard,n,z
+    https://review.opendev.org/#/q/status:open+project:openstack/heat-dashboard,n,z

doc/source/contributor/devstack.rst

@@ -5,7 +5,7 @@ Use Heat Dashboard in DevStack
 Set up your ``local.conf`` to enable heat-dashboard::
 
     [[local|localrc]]
-    enable_plugin heat-dashboard https://git.openstack.org/openstack/heat-dashboard
+    enable_plugin heat-dashboard https://opendev.org/openstack/heat-dashboard
 
 
 .. note::

tox.ini

@@ -13,7 +13,7 @@ setenv =
   NOSE_OPENSTACK_RED=0.05
   NOSE_OPENSTACK_YELLOW=0.025
   NOSE_OPENSTACK_SHOW_ELAPSED=1
-deps = -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+deps = -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands = {[unit_tests]commands}
@@ -57,13 +57,13 @@ commands =
 
 [testenv:docs]
 basepython = python3
-deps = -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+deps = -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
        -r{toxinidir}/doc/requirements.txt
 commands = python setup.py build_sphinx
 
 [testenv:releasenotes]
 basepython = python3
-deps = -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+deps = -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
        -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html