LU-4825 osp: rename variables to match /proc entry

LU-4825 osp: rename variables to match /proc entry

Rename the opd_pre_min_grow_count, opd_pre_max_grow_count,
opd_pre_grow_slow, and opd_pre_grow_count to opd_pre_min_create_count,
opd_pre_max_create_count, opd_pre_create_slow and opd_pre_create_count
respectively, for consistency with /proc files osp.*.max_create_count
and osp.*.create_count to make them easier to find, and also many
other internal functions are named "precreate" instead of "grow".

Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: I3a3ef3a0f13d593e9d0f8cedb53cc690528c0c7f
Reviewed-on: http://review.whamcloud.com/16032
Tested-by: Jenkins
Reviewed-by: Jian Yu <jian.yu@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>