LU-274 Update LVB from disk when glimpse callback return error

LU-274 Update LVB from disk when glimpse callback return error

  Client ll_glimpse_callback() could fail to get inode if the inode is
  already been cleared, and this glimpse callback will fail for
  -ELDLM_NO_LOCK_DATA, so server should update LVB from disk
  (in filter_intent_policy()) when it received such error from client.

Issue:
Signed-off-by: Niu Yawei <niu@whamcloud.com>
Change-Id: I29b2fe4b35114359b0ad62106de48f5f2f696636
Reviewed-on: http://review.whamcloud.com/507
Tested-by: Hudson
Reviewed-by: Johann Lombardi <johann@whamcloud.com>