Merge pull request #3975 from wonzhq/skip-cache

osd: flush/evict op fixes

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

diff --cc src/osd/OSD.cc
Simple merge

diff --cc src/osd/OpRequest.cc
Simple merge

diff --cc src/osd/OpRequest.h
Simple merge

diff --cc src/osd/ReplicatedPG.cc
Simple merge

diff --cc src/osd/ReplicatedPG.h
Simple merge

diff --cc src/test/librados/tier.cc
Simple merge