LU-13940 llite: it_lock_bits should be bit-wise tested

LU-13940 llite: it_lock_bits should be bit-wise tested

If lock_mode is not set then ensure that it_lock_bits has
the MDS_INODELOCK_OPEN bit set

Fixes: 5db0e2de00 ("LU-7403 llite: flatten struct lookup_intent")
HPE-bug-id: LUS-9198
Signed-off-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Change-Id: Icccaa59cd5b47a7d3f97569a452f34b33e905409
Reviewed-on: https://review.whamcloud.com/39797
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Petros Koutoupis <petros.koutoupis@hpe.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Yingjin Qian <qian@ddn.com>