LU-8589 osd: remove "object" from method function names

LU-8589 osd: remove "object" from method function names

Remove "object_" from various OSD API dt_object_operations
method functions (create, destroy, {read,write}_{lock,unlock},
write_locked, ref_add, ref_del, and declare_ variants of same)
to match the actual method names so the code is easier to trace.

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: I18860bc965f958d6ba2e595882e7e56ca00cab07
Reviewed-on: https://review.whamcloud.com/22542
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>