LU-10297 lod: prepare inuse array always

LU-10297 lod: prepare inuse array always

The OST inuse array should be prepared for composite files and for
plain files as well, since creating OST objects in both cases needs
to use it.

Lustre-change: https://review.whamcloud.com/30334
Lustre-commit: 2cca16ba7da4070c319cc6230b7dbb3e7a91e323

Signed-off-by: Bobi Jam <bobijam.xu@intel.com>
Change-Id: Ibb37b680c68f8883650cdee6bebebc1c4d844623
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Signed-off-by: Minh Diep <minh.diep@intel.com>
Reviewed-on: https://review.whamcloud.com/30486
Reviewed-by: Bobi Jam <bobijam@hotmail.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>