OpenAPITools#582 Fixed the generation of model properties whose data …

…type is a composed (allOf) schema. Before this fix, the data type name of the generated property was that of the first model participating in the allOf clause. After this fix the property data type is again as expected: the one of the composed schema and not one of its parents.

modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/ModelUtils.java

@@ -648,7 +648,7 @@ public static Schema unaliasSchema(Map<String, Schema> allSchemas, Schema schema
             } else if (isStringSchema(ref) && (ref.getEnum() != null && !ref.getEnum().isEmpty())) {
                 // top-level enum class
                 return schema;
-            } else if (isMapSchema(ref) || isArraySchema(ref)) { // map/array def should be created as models
+            } else if (isMapSchema(ref) || isArraySchema(ref) || isComposedSchema(ref)) { // map/array def should be created as models
                 return schema;
             } else {
                 return unaliasSchema(allSchemas, allSchemas.get(ModelUtils.getSimpleRef(schema.get$ref())));