LU-11668 mdd: use mdd_object_fid() instead of mdo2fid()

LU-11668 mdd: use mdd_object_fid() instead of mdo2fid()

Both mdd_object_fid() and mdo2fid() helper functions are the same.
Replace mdo2fid() with the better-named mdd_object_fid(mdd_obj)
function everywhere.  Use mdd_obj_dev_name(mdd_obj) for console
error messages instead of mdd2obd_dev(mdd)->obd_name for consistency.

It would be nice to consistently use "mdd_obj" for objects (instead of
"o" or "mo" or "obj", ...) and "mdd" for devices (instead of "m"), but
that is too big to include in this patch.  Just replace them in the
few wrapper functions already affected by this patch.

Fix up whitespace and string formatting style in affected code.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I6de748bada06f0f66123e4567115deb2633ebbe5
Reviewed-on: https://review.whamcloud.com/35047
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Petros Koutoupis <petros.koutoupis@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>