[BUG] 'oneOf' property is not working with two references Description

oneOf directive of openapi 3.0.0 is not working as expected in openapitool generator version 5.1.0 for java client.

Generator used : Spring
library : spring-mvc

Issue it is appending both the names in the import eg import com.test.cx.communications.dx4c.fuzz.tmf632.model.OneOfDX4CPartyIndividualPayloadDX4CPartyOrganizationPayload;

                    snippet:
                    
                                      DX4CPartyEventPayload:
                                          type: object
                                          description: The notification data structure
                                          properties:
                                            eventId:
                                              type: string
                                              description: The identifier of the notification.
                                            eventTime:
                                              type: string
                                              description: Time of the event occurrence.
                                            description:
                                              type: string
                                              description: An explanatory of the event.
                                            title:
                                              type: string
                                              description: The title of the event.
                                            eventType:
                                              type: string
                                              description: The type of the notification.
                                            correlationId:
                                              type: string
                                              description: The correlation id for this event.
                                            event:
                                              oneOf:
                                                - $ref: "#/components/schemas/DX4CPartyIndividualPayload"
                                                - $ref: "#/components/schemas/DX4CPartyOrganizationPayload"
                                    
                                    
                                        DX4CPartyIndividualPayload:
                                          type: object
                                          description: Individual Payload
                                          properties:
                                            individual:
                                              $ref: "#/components/schemas/Individual"
                                    
                                        DX4CPartyOrganizationPayload:
                                          type: object
                                          description: Organization Payload
                                          properties:
                                            organization:
                                              $ref: "#/components/schemas/Organization"

Start by reproducing the supplied OpenAPI 3 schema with the Java Spring generator using the spring-mvc library. Inspect the generated imports for the oneOf property containing DX4CPartyIndividualPayload and DX4CPartyOrganizationPayload; done means the generated client no longer combines both referenced names incorrectly in one import.