EX-7601 ofd: rename map_remote_to_local

EX-7601 ofd: rename map_remote_to_local

osd_map_remote_to_local implies some complex role, but in
fact what this does is initialize the fields of the
local niobuf structs to represent the requested range.

This *may* be the same as a remote niobuf, but it also
isn't in some cases.  Name it osd_init_lnbs instead.

Test-Parameters: trivial
Signed-off-by: Patrick Farrell <pfarrell@whamcloud.com>
Change-Id: I0d3b5f24e42ee8dc962437daea7cf9347ccb9059
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/52861
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Artem Blagodarenko <ablagodarenko@ddn.com>