TLDR

1. the general models representation at the bottom of the page
2. @XmlRootElement.name is not considered in sample XML for
   a) request parameters ~~~unless there is also a @JacksonXmlRootElement present~~~
   b) return types

Steps to Reproduce

An example of the above bugs is in https://github.com/elonderin/springfox-swagger2-bug-xmlrootelement.

This is a fork of gs-rest-service that i extended for this case with these models:

    @JacksonXmlRootElement(localName = "greeting-jaxb")
    @XmlRootElement(name = "greeting-jaxb")
    public class Greeting2 {
    
      @XmlElement(name = "my-id")
      ...
    }
    
    @XmlRootElement(name = "greeting-jaxb")
    public class Greeting {
    
      @XmlElement(name = "my-id")
      private final long   id;
      private final String content;
      ...
    }

1. compile and run the complete/ subfolder
2. open http://localhost:8080/swagger-ui.html#/

Case: the general models representation at the bottom of the page

1. open the Models section
   💥 both have the java class name, neither the Jason nor JAXB Annotations are honored

Case: @XmlRootElement.name is not considered in sample XML for request parameters unless there is also a @JacksonXmlRootElement present

1. open /post
   💥 the root tag is <Greeting> but should be <greeting-jaxb>
2. open /post2

:sob: now that i write this issue report, i cant reproduce this anymore, so plz ignore for now ...

### Case: @XmlRootElement.name is not considered in sample XML for return types
1. open `/greeting`
:boom: the root tag is `<Greeting>` but should be `<greeting-jaxb>` 
 
## Context
This might be related to #2393 but this bug seems to tackle another/more specific case this one is simpler 

* it  might only affect the UI
* it is tested against 2.9.2