If a standard shipping is set, it is not automatically set to erp entities if these have linked erp entities.
In this case, these erp entities have been created from the others. the shipping has then been changed, deleted, etc.

* Implemented new ERP Entity Interface
* Extension of standard shipping costs: consider country of customer
  * Now when the address is changed AND the default shipping cost is assigned, the default shipping price will be adjusted accordingly

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