Merge pull request #5000 from ceph/wip-da-SCA-20150601

Various SCA and Coverity fixes

Reviewed-by: Kefu Chai <kchai@redhat.com>

diff --cc src/mds/MDCache.cc
Simple merge

diff --cc src/mon/MDSMonitor.cc
Simple merge

diff --cc src/mon/OSDMonitor.cc
Simple merge

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

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

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

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

diff --cc src/rgw/rgw_common.cc
Simple merge

diff --cc src/test/perf_local.cc
Simple merge

diff --cc src/tools/rados/rados.cc
Simple merge