LU-8922 lod: check master stripes properly

LU-8922 lod: check master stripes properly

When creating striped directory, it should
first check if the stripe has been created
on the current MDT, otherwise it might create
duplicate stripes on the master MDT, especially
when one MDT is deactived, and specified stripes
is larger than the active MDTs.

Test-Parameters: envdefinitions=ONLY=50 testlist=conf-sanity,conf-sanity,conf-sanity
Test-Parameters: envdefinitions=ONLY=50 testlist=conf-sanity,conf-sanity,conf-sanity
Signed-off-by: Di Wang <di.wang@intel.com>
Change-Id: Id3bba2817c4c7c9584f9129e32555f0f676b3364
Reviewed-on: https://review.whamcloud.com/24776
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>