[stable][glance] Proposing Cyril for stable branch core

Hi All, Cyril Roelandt is helping a lot in the review process on master as well as stable branches. I would like to have him in our 'glance-stable-maint' team. Could you please help me to add 'cyril@redhat.com' to the stable core team. Thanks & Best Regards, Abhishek Kekane