BZ6074: setting import flag when staged file imported in aqbasket

BZ6074: setting import flag when staged file imported in aqbasket

Lines issued from a staged file have a flag that can be set when the order has
been added in a basket. It's set when a staged file is imported into the
catalogue, it should be set also when a record is inserted through aquisition.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
- Add order from staged file to a new basket
- Add single order from one item
- Import rest using the bulk feature
- Staged file will no longer be shown after all titles
  have been ordered and import_status in import_batches
  is correctly  set to 'imported'

Signed-off-by: Ian Walls <ian.walls@bywatersolutions.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>