Merge pull request #6205 from jcsp/wip-volume-client

pybind: add ceph_volume_client interface for Manila and similar frameworks

Reviewed-by: Greg Farnum <gfarnum@redhat.com>

diff --cc ceph.spec.in
Simple merge

diff --cc src/CMakeLists.txt
Simple merge

diff --cc src/libcephfs.cc
Simple merge

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