RadosClient: handle command replies
ceph: fix exception msg
ceph: pop off 'target' before sending command
rados.py: errnos must have errno. qualifier
Set conffile to passed -c, not conf

Signed-off-by: Dan Mick <dan.mick@inktank.com>
Return correct error to main; always write outs to stderr

Signed-off-by: Dan Mick <dan.mick@inktank.com>
Check for and handle old-monitor

If it doesn't support get_command_descriptions, just send the
entire command.

Signed-off-by: Dan Mick <dan.mick@inktank.com>
rados.py: remove debug prints from *_command

Signed-off-by: Dan Mick <dan.mick@inktank.com>
ceph: restructure so old-style commands and new-style can share code

Signed-off-by: Dan Mick <dan.mick@inktank.com>