[IMP] Event: Split Tickets
Make order line per attandee
Attendees are created on SO confirm.

[IMP] TEST CASE:  Improved the test case to meet the requiremnts of new features.

[IMP]Improved template and methods andd destroy session variables after completation.

[IMP] Improved code and done without session and improved test case.

Update sale_order.py

Missed to remove some code.