LU-6827 osd: trans credit insufficient for EA object create

LU-6827 osd: trans credit insufficient for EA object create

EA object consumes more credits than regular object: osd_mk_index vs.
osd_mkreg, this patch reserves more credits for OSD_OT_CREATE
operation.

Signed-off-by: Bobi Jam <bobijam.xu@intel.com>
Change-Id: I40ec58ca467474ec4d96e5a1d24164fae03fc227
Reviewed-on: http://review.whamcloud.com/15694
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>