Amend Defined Interface updates (#566)

Signed-off-by: abarreiro <abarreiro@vmware.com>

.changes/v2.20.0/527-features.md

@@ -1,3 +1,3 @@
 * Added support for Runtime Defined Entity Interfaces with client methods `VCDClient.CreateDefinedInterface`, `VCDClient.GetAllDefinedInterfaces`,
   `VCDClient.GetDefinedInterface`, `VCDClient.GetDefinedInterfaceById` and methods to manipulate them `DefinedInterface.Update`,
-  `DefinedInterface.Delete` [GH-527]
+  `DefinedInterface.Delete` [GH-527, GH-566]

.changes/v2.20.0/545-features.md

@@ -1,3 +1,3 @@
 * Added support for Runtime Defined Entity Types with client methods `VCDClient.CreateRdeType`, `VCDClient.GetAllRdeTypes`,
   `VCDClient.GetRdeType`, `VCDClient.GetRdeTypeById` and methods to manipulate them `DefinedEntityType.Update`,
-  `DefinedEntityType.Delete` [GH-545]
+  `DefinedEntityType.Delete` [GH-545, GH-566]

govcd/defined_entity.go

@@ -153,6 +153,9 @@ func (rdeType *DefinedEntityType) Update(rdeTypeToUpdate types.DefinedEntityType
 	if rdeTypeToUpdate.Schema == nil || len(rdeTypeToUpdate.Schema) == 0 {
 		rdeTypeToUpdate.Schema = rdeType.DefinedEntityType.Schema
 	}
+	rdeTypeToUpdate.Version = rdeType.DefinedEntityType.Version
+	rdeTypeToUpdate.Nss = rdeType.DefinedEntityType.Nss
+	rdeTypeToUpdate.Vendor = rdeType.DefinedEntityType.Vendor
 
 	endpoint := types.OpenApiPathVersion1_0_0 + types.OpenApiEndpointRdeEntityTypes
 	apiVersion, err := client.getOpenApiHighestElevatedVersion(endpoint)

govcd/defined_interface.go

@@ -139,6 +139,11 @@ func (di *DefinedInterface) Update(definedInterface types.DefinedInterface) erro
 		return fmt.Errorf("ID of the receiver Defined Interface and the input ID don't match")
 	}
 
+	// We override these as they need to be always sent on updates
+	definedInterface.Version = di.DefinedInterface.Version
+	definedInterface.Nss = di.DefinedInterface.Nss
+	definedInterface.Vendor = di.DefinedInterface.Vendor
+
 	endpoint := types.OpenApiPathVersion1_0_0 + types.OpenApiEndpointRdeInterfaces
 	apiVersion, err := client.getOpenApiHighestElevatedVersion(endpoint)
 	if err != nil {