[JAVA] JAXB annotations missing for JAVA enums

Description

When you add xml namespace in swagger for enum, the generated class doesnt get annotated with @XmlRootElement and @XmlAccessorType

Swagger-codegen version

latest version (3.0.22)

Swagger declaration file content or url

    jurisdiction:
      xml:
        namespace: 'http://example.com/schema/1'
      type: string
      "enum": [
        "VIC",
        "NSW"
      ]

Steps to reproduce

Create a swagger definition with an enum as provided in the code sample.
Generate a Java client using the maven plugin or the CLI
Observe that the Java enum classe generated do not have JAXB annotations

Related issues/PRs

Suggest a fix/enhancement

The problem seems to be caused by the enumOuterclass.mustache not having {{>xmlAnnotation}} as the pojo.mustache.

swagger-codegen/modules/swagger-codegen/src/main/resources/JavaSpring/enumOuterClass.mustache
https://github.com/swagger-api/swagger-codegen/blob/master/modules/swagger-codegen/src/main/resources/JavaSpring/enumOuterClass.mustache

This issue can be resolved by adding the following to enumOuterClass.

In the import section
{{#withXml}}
import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlRootElement;
import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlElementWrapper;
{{/withXml}}

And before public enum declaration
{{>xmlAnnotation}}

Start with modules/swagger-codegen/src/main/resources/JavaSpring/enumOuterClass.mustache and compare it with the pojo.mustache template's XML annotation handling. Reproduce the output using the supplied enum definition with the Maven plugin or CLI. Done means generated Java enum classes include the expected JAXB/XML annotations when an XML namespace is specified.