Review: pass CephOsdName as int64_t 'id' for convenience in mon code
OSDMonitor: osd id when id already exists needs to come to stdout too

Found by qa/workunits/mon/osd.sh

Signed-off-by: Dan Mick <dan.mick@inktank.com>
Clean up CrushWrapper methods that take string: no c_str() necessary

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