Code clean-up due to type order enhancement

Removed code related old Order. Cleaned redundant
fields from Order model. Also cleaned the API, no
more support for old style orders.

- Fixed broken functional test
- Fixed alembic version conflict due to CR 122498

Closes-Bug: 1335171

Change-Id: I33fe7a75568e0108c623e8f6f786fb9e9b888d36