List the versions of OSDs in a Ceph cluster

List the versions that each OSD in a Ceph cluster is running. It is handy to find out how mixed the cluster is.

# ceph tell osd.* version
osd.0: { "version": "ceph version 0.67.4 (ad85ba8b6e8252fa0c7)"}
osd.1: { "version": "ceph version 0.67.5 (a60acafad6096c69bd1)"}
osd.3: Error ENXIO: problem getting command descriptions from osd.3
osd.6: { "version": "ceph version 0.72.2 (a913ded64099cfd60)"}
osd.7: { "version": "ceph version 0.72.1 (4d923874997322de)"}
osd.8: { "version": "ceph version 0.72.1 (4d923874997322de)"}
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