Custom Lot Number Generation - Oracle E-Business Inventory

To do this:
1. Select the lot number generation option as "‘User-Defined"
2. Write the code to generate the lot number as per the business need in the procedure
    generate_lot_number
3. This procedure is found in the file "‘INVUDLGS.pls"
4. Package Name : user_pkg_lot , method name : generate_lot_number