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
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.
Pull requests submitted through GitHub will be ignored.
Bugs should be filed on Launchpad, not in GitHub's issue tracker.