LU-11518 osc: cancel osc_lock list traversal once found the lock is being used

LU-11518 osc: cancel osc_lock list traversal once found the lock is being used

Currently, in osc_ldlm_weigh_ast, it walks osc_lock list (oo_ol_list)
to check whether target dlm is being used, normally, if found, it needs
to skip the rest ones and cancel the traversal, but it doesn't, let's
fix it here.

Change-Id: I2e64d2938cdacb6c5baca73647d74c9fb8f54f8c
Fixes: 3f3a24dc5d7d ("LU-3259 clio: cl_lock simplification")
Signed-off-by: Gu Zheng <gzheng@ddn.com>
Reviewed-on: https://review.whamcloud.com/35396
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Patrick Farrell <pfarrell@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Li Xi <lixi@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>