LU-4825 osp: check max_create_count before use OSP

LU-4825 osp: check max_create_count before use OSP

in OSP precreate, if max_create_count is 0, return error directly
to use next OST, this can be used in OST migration.

add sanity.sh 311 for this.

Signed-off-by: Lai Siyao <lai.siyao@intel.com>
Change-Id: I3f1cb84b30229911564969bcfc52b9e7c03a00d4
Reviewed-on: http://review.whamcloud.com/16105
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Jenkins
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>