Updated README.md file with property dependency

Author: becksbyte

Specialized Areas/ATF Steps/Validate RITM Due Date/README.md

@@ -5,4 +5,5 @@ This script will calculate a due date for a RITM based off of the delivery date
 You can use this in a "Run Server Side Script" ATF test step. This is specfic for RITM's and Catalog Item's with Delivery Times
 
 ## Prerequisites/Dependencies:
-In your ATF Test Case, you need to create a ATF Test Step that does a Record Query for the RITM record before running this script. The sys id of that Record Query Step is used in the scipt to obtain a GlideRecord of the RITM.
+1) In your ATF Test Case, you need to create a ATF Test Step that does a Record Query for the RITM record before running this script. The sys id of that Record Query Step is used in the scipt to obtain a GlideRecord of the RITM.
+2) You need a system property called "glide.sc.item.delivery_schedule" that contains the sys id of a record on the cmn_schedule table that will be used for the due date calculation