LU-359 llite: no close error if application has known failure

LU-359 llite: no close error if application has known failure

Don't return error again when close if the application has known
former write failure to avoid potenical rdundant error handling,
like confused error message.

Signed-off-by: Fan Yong <yong.fan@whamcloud.com>
Change-Id: I62d9cd83fc03fad22c994f2a77774ca113a6c057
Reviewed-on: http://review.whamcloud.com/596
Reviewed-by: Niu Yawei <niu@whamcloud.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@whamcloud.com>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>