Fix Calculation of Sector Bitmap Blocks Count
Fix Calculation of Sector Bitmap Blocks Count

The Sector Bitmap Blocks count and Data Blocks count values were calculated
using Integer division and ".ceil" when float division should have been used.
Consequently the sector bitmap blocks count could occasionally be 0 for small checkpoint
disks, resulting in the issue this PR addresses.

rsevilla87/manageiq-gems-pending,aljesusg/manageiq-gems-pending,rsevilla87/manageiq-gems-pending,aljesusg/manageiq-gems-pending