[stable][EM] Extended Maintenance - Queens

Hi, As it was agreed during PTG, the planned date of Extended Maintenance transition of Queens is around two weeks after Train release (a less busy period) [1]. Now that Train is released, it is a good opportunity for teams to go through the list of open and unreleased changes in Queens [2] and schedule a final release for Queens if needed. Feel free to use / edit / modify the lists (I've generated the lists for repositories which have 'follows-policy' tag). I hope this helps. [1] https://releases.openstack.org/ [2] https://etherpad.openstack.org/p/queens-final-release-before-em Thanks, Előd