If you would like to contribute to the development of OpenStack, you must follow the steps documented at:
http://docs.openstack.org/infra/manual/developers.html#getting-started
Once those steps have been completed, changes to OpenStack should be submitted for review via the Gerrit tool, following the workflow documented at:
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 GitHub:
https://bugs.launchpad.net/glance
Additionally, specific guidelines for contributing to Glance may be found in Glance's Documentation:
https://docs.openstack.org/glance/latest/contributor/index.html
Please read and follow these Glance-specific guidelines, particularly the section on Disallowed Minor Code Changes. You will thereby prevent your friendly review team from pulling out whatever hair they have left. Thank you for your cooperation.