Reversed target group from ceil() to round()

Reversing decision in story 1418 to use Math.ceil instead of
Math.round().
SELV-126: Added ISA in doses to EPI Inventory Line Items

Modified ISA calculation to be in terms of base unit/dose instead of by
pack size.  Added calculation that calculates ISA by pack size using
the ceiling of that result instead of rounding.  Added tests. Added new
db column to epi_inventory_line_items to capture ISA in both the base
unit and by pack size at distribution initiation.

Conflicts:
	modules/openlmis-web/src/main/webapp/public/pages/logistics/distribution/partials/epi-inventory.html