OPSMN-3372: Used Math.round() function to calculate available quantity
OPSMN-3372: Used Math.round() function to calculate available quantity

Issue:
  This issue occured while calculating available quantity by reducing aliquot
  quantity (represented in floating number) from parent quantity

Cause: JavaScript uses floating point math which always leads to rounding errors.

krishagni/openspecimen,krishagni/openspecimen,krishagni/openspecimen