v15.2.7 Octopus released

This is the 7th backport release in the Octopus series. This release fixes a serious bug in RGW that has been shown to cause data loss when a read of a large RGW object (i.e., one with at least one tail segment) takes longer than one half the time specified in the configuration option `rgw_gc_obj_min_wait`. The bug causes the tail segments of that read object to be added to the RGW garbage collection queue, which will in turn cause them to be deleted after a period of time. Changelog --------- * rgw: during GC defer, prevent new GC enqueue Getting Ceph ------------ * Git at git://github.com/ceph/ceph.git * Tarball at http://download.ceph.com/tarballs/ceph-15.2.7.tar.gz * For packages, see http://docs.ceph.com/docs/master/install/get-packages/ * Release git sha1: 88e41c6c49beb18add4fdb6b4326ca466d931db8