Fix the old links in docs

Fix the old http url links in docs according
to the lastest OpenStack websites.

Change-Id: I843b024429050a215e69b6f6e8ae4da4645632df

CONTRIBUTING.rst

@@ -1,14 +1,14 @@
 If you would like to contribute to the development of OpenStack, you must
 follow the steps in this page:
 
-   http://docs.openstack.org/infra/manual/developers.html
+   https://docs.openstack.org/infra/manual/developers.html
 
 If you already have a good understanding of how the system works and your
 OpenStack accounts are set up, you can skip to the development workflow
 section of this documentation to learn how changes to OpenStack should be
 submitted for review via the Gerrit tool:
 
-   http://docs.openstack.org/infra/manual/developers.html#development-workflow
+   https://docs.openstack.org/infra/manual/developers.html#development-workflow
 
 Pull requests submitted through GitHub will be ignored.
 

README.rst

@@ -8,7 +8,7 @@ for Congress. With congress-dashboard, a user is able to easily write the
 policies and rules for governance of cloud.
 
 * Free software: Apache license
-* Source: http://git.openstack.org/cgit/openstack/congress-dashboard
+* Source: https://git.openstack.org/cgit/openstack/congress-dashboard
 * Bugs: https://bugs.launchpad.net/congress
 * Documentation: https://docs.openstack.org/congress-dashboard/latest/
 * Release notes: https://docs.openstack.org/releasenotes/congress-dashboard/

congress_dashboard/README.md

@@ -11,7 +11,7 @@ Setup Instructions
 This instruction assumes that Horizon is already installed and its
 installation folder is <horizon>. Detailed information on how to install
 Horizon can be found at
-http://docs.openstack.org/developer/horizon/quickstart.html#setup.
+https://docs.openstack.org/horizon/latest/install/index.html
 
 To integrate congress with horizon, copy the files in
 <congress_dashboard>/enabled to <horizon>/openstack_dashboard/local/enabled/