LU-5468 llite: don't call make_bad_inode() on an old inode

LU-5468 llite: don't call make_bad_inode() on an old inode

In ll_iget() if ll_update_inode() fails then do not call
make_bad_inode() on the inode since it may still be in use.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: I10bb0ad606fad2eff6f6cf5cc7da157e9db59c94
Reviewed-on: http://review.whamcloud.com/11609
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>