Bug fixes for landedCost and LandedCostAllocation

[SusanneCalderon]

Status for working with landed Costs and landedCostAllocation:
Window Purchase Invoice, Line InvoiceLine
Step 1: Generate a Landed Cost entry with the button Generate Landed Cost
Result: depending on the parameter create by product one or several LandedCost entries are generated

Now you can distribute the costs and generated the corresponding landed cost allocation entries with the button distribute Costs. This is preliminary because when the invoice is completed all landed cost allocations will be deleted and generated again.
The process generates also the Costdetail entries for the calculation of the new costs of the corresponding products.

Step 2: Complete the Invoice
All landed cost allocations are deleted and are generated again with the method MInvoiceLine.allocateLandedCosts(). The Costdetails will not be generated and must be generated by using the button Distribute Costs.

Problems

• In the method MInvoiceLine.allocateLandedCosts() the sequence of the delete statements must be changed. First the costdetails must be deleted, then the landedcost allocations. Otherwise referential integrity is not accomplished.

• The process Distribute costs should not generate the cost detail entries. As the invoice is not completed the distribution is preliminary. So when the invoice is cancelled or deactivated you have included non-existing costs in your product costs. This problem is evident when you are using costing method average invoice.

In the following screenshot the invoice is cancelled, but the Cost Details are still in the calculation of the new average cost.

• When you complete the invoice the cost detail entries are not generated automatically. So until recalculating the product costs manually with the button _distribute costs_the product costs lack the distributed costs of this invoice.