Improve support of spring mvc request mapping

[herau]

Currently a correct spring mvc declaration, like below, will show a wrong path value in the jsondoc

/api/widgetframe instead of /api/widget/frame

@RestController
@RequestMapping(path = {"/api/widget"})
class WidgetController {
    @RequestMapping(method = GET, path = "frame")
    public String getItem(){}
}