OpenAPI path to entity wrongly repeats the parent's key segments despite referential constraint

[HeikoTheissen]

This pull request is not meant to be merged, it only provides a reproducible example for a bug.

In this Swagger UI the path

GET /InsurancePolicy/{InsurPlcyUUID}/{InsurPlcyApplUUID}
/_DistributionPlan/{InsurPlcyUUID-1}/{InsurPlcyApplUUID-1}/{InsurPlcyInsurContr-1}/{InsurPlcyCoveragePackageID-1}/{InsurPlcyCoverageID-1}/{InsurPlcyDistrPlnRelshpID-1}
/_CoinsuranceHeader/{InsurPlcyCoinsurHdrUUID-2}/{InsurPlcyCoinsurVersionID-2}
/_CoinsuranceShareSegment/{InsurPlcyCoinsurHdrUUID-3}/{InsurPlcyCoinsurVersionID-3}/{InsurPlcyCoinsurSegmentID-3}

wrongly repeats the InsurPlcyCoinsurHeader_Type key segments for the navigation property _CoinsuranceShareSegment. According to the OData spec, these key fields must be omitted in the key-as-segment convention, because _CoinsuranceShareSegment has a partner navigation property _CoinsuranceHeader with a referential constraint:

https://github.com/oasis-tcs/odata-openapi/blob/a48b0b23a3bff31000b43e75b2dd6c95258eff33/tools/tests/insurance.xml#L3528-L3537

<NavigationProperty Name="_CoinsuranceHeader"
  Type="com.sap.gateway.srvd_a2x.api_insurancepolicyservice_3.v0001.InsurPlcyCoinsurHeader_Type"
  Nullable="false" Partner="_CoinsuranceShareSegment">
  <ReferentialConstraint
    Property="InsurPlcyCoinsurHdrUUID"
    ReferencedProperty="InsurPlcyCoinsurHdrUUID" />
  <ReferentialConstraint
    Property="InsurPlcyCoinsurVersionID"
    ReferencedProperty="InsurPlcyCoinsurVersionID" />
</NavigationProperty>