[JAVA] generate a wrong class using inheritence and discriminator

Description

Given this config:

  riskObject:
      type: object
      discriminator:
        propertyName: riskType
      properties:
        riskType:
          type: string

classOne:
  type: object
 allOff:
    - $ref: ''#/components/schemas/riskObject'
......

After Generating a class with prefix "Api" the result is:
`@Validated @javax.annotation.Generated(value = "org.openapitools.codegen.languages.SpringCodegen", date = "2019-01-30T15:17:33.825+01:00[Europe/Paris]") @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type", visible = true ) @JsonSubTypes({ @JsonSubTypes.Type(value = **classRiskOne.class**, name = "classRiskOne") })`

this result is wrong. i excpet **ApiClassRiskOne.class**, this is wok fin with generator version **3.1.2** but there is a regression since version **3.2.0**

in pom conf
modelNamePrefix>Api</modelNamePrefix>
is ignored for inheritence

openapi-generator version

Since 3.2.0

Reproduce the generated Java classes from the supplied discriminator schema with modelNamePrefix set to Api, comparing generator versions 3.1.2 and 3.2.0. Trace the inheritance and discriminator model-naming path, then verify that the generated @JsonSubTypes reference uses ApiClassRiskOne.class rather than classRiskOne.class.