Merge pull request #10231 from yonghengdexin735/wip-zzz-paxosserver-type

mon/PaxosService: make the return value type inconsistent

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

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

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

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