Merge pull request #9248 from xiexingguo/xxg-wip-expose-requirejewel

mon: expose require_jewel_osds flag to user

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

diff --cc qa/workunits/cephtool/test.sh
Simple merge

diff --cc src/mon/MonCommands.h
Simple merge

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