Merge pull request #1941 from yuyuyu101/wip-8564

Fix write operation on a deleted object in the same transaction(KeyValueStore)

Reviewed-by: Sage Weil <sage@inktank.com>

diff --cc src/os/KeyValueStore.cc
Simple merge

diff --cc src/os/KeyValueStore.h
Simple merge

diff --cc src/test/objectstore/store_test.cc
Simple merge