Branch HEAD

b=13375
i=adilger
i=johann
i=nathan

Descriptoin: make lov_create() will not stuck in obd_statfs_rqset()
Details    : If an OST is down the MDS will hang indefinitely in
             obd_statfs_rqset() waiting for the statfs data. While for
             MDS QOS usage of statfs, it should not stuck in waiting.