LU-1095 lod: quiet "wanted N, found M" console message

LU-1095 lod: quiet "wanted N, found M" console message

Quiet the relatively useless "wanted 1, found 0" console message from
lod_alloc_qos(), since this is not a fatal error - the MDS will fall
back to lod_alloc_rr() in this case.

Clean up lod_alloc_qos() to use a sensible variable name "lod" for the
LOD OBD device instead of "m", which doesn't really mean anything.

Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: I882636a6b89fa2bcf76383ede8486be9c4300c1e
Reviewed-on: http://review.whamcloud.com/17131
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>