LU-17000 coverity: Fix Resource Leak(2)

LU-17000 coverity: Fix Resource Leak(2)

This patch fixes error reported by coverity run.

CoverityID: 397140 ("Resource leak"): lfs.c
CoverityID: 397370 ("Resource leak"): dir.c
CoverityID: 397378 ("Resource leak"): obd.c
CoverityID: 397406 ("Resource leak"): obd.c

Signed-off-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Change-Id: I92bbf6749d667631b92868bcaf78af558c250441
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/52686
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Patrick Farrell <pfarrell@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>