LU-16629 osd: refill the existing env

LU-16629 osd: refill the existing env

During the LDLM lock callback, the "lu_env" is created in
ldlm_bl_thread_main, which is initiated by "ldlm_setup",
and it could have no key of "osd_thread_info" yet, then it
need to call "lu_env_refill" to refill the keys.

Lustre-change: https://review.whamcloud.com/50270
Lustre-commit: TBD (from c9673c45a9c279b12ccb8804d54508905a1e79ee)

Change-Id: Ibae978a5a10826c2e3186012911870ce7bf0b147
Signed-off-by: Hongchao Zhang <hongchao@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/50273
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>