Reviewed promised based thread synchronisation
Fixed calls to promise::get_future() after possible access form other thread. They are now guaranteed to happen before. Added helgrind annotations for promise based synchronisation. Added macros enabling helgrind annotations for shared_ptr. Added suppression for shared_ptr used inside other standard lib object and not covered by the previous macros. Added unit test for lower level . Added suppressions for reported race conditions in Rados library. Review heavily MemArchiveQueue and fixed missing commit in object store, leading to potentially orphaned objects. Enabled formerly disabled test as it is now fast enough.