LU-12848 tests: link succeded to an ophan remote object

LU-12848 tests: link succeded to an ophan remote object

An open file gets unlinked by rename,
at the same time a cross-mdt link is able to create a name
for a dying object. That causes a file system corruption
seeing as a failed attempt to remove the test dir, also
e2fsck would see an unconnected inode.

Cray-bug-id: LUS-6208
Test-Parameters: mdtcount=2 envdefinitions=ONLY=111 testlist=sanityn
Change-Id: Ic1fde278e5f4b53eaf5560ab50fe460d8c7f7dc3
Signed-off-by: Alexander Zarochentsev <alexander.zarochentsev@hpe.com>
Reviewed-on: https://review.whamcloud.com/35991
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Lai Siyao <lai.siyao@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>