final squash

tiny refactoring (continued)
````java
    @RequestMapping(method = RequestMethod.GET)
    public ResponseEntity<byte[]> getImageUpload(@RequestParam("name") String ID, @RequestParam("height") int height,
                                                 @RequestParam("width") int width) throws JcrException, IOException {

        imageResponce = imageService.getImage(ID + "-image", height, width);
        final HttpHeaders headers = new HttpHeaders();
        String responseMediaType = imageResponce.getMimeType();
        if(isSupportedFormat(responseMediaType)){
            headers.setContentType(MediaType.parseMediaType(responseMediaType));
        }
        headers.setContentLength(imageResponce.getContent().length);
        return new ResponseEntity<>(imageResponce.getContent(), headers, HttpStatus.OK) ;
    }
````