LU-2279 osp: do not spin awaiting for connection

LU-2279 osp: do not spin awaiting for connection

modify ready condition for osp_precreate_reserve() so that
it ignores -ENODEV and instead rely on expiration mechanism.

Signed-off-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Change-Id: Id59e75bb17c603140616f34e08c98a6f31f10a8d
Reviewed-on: http://review.whamcloud.com/4847
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: wangdi <di.wang@intel.com>
Reviewed-by: Li Wei <wei.g.li@intel.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>