format parameter should be optional

[rdmueller]

the current version displays the format parameter as "required" but it should be optional.
I even wouldn't have expected it to show up since swagger handles the format through headers.

http://localhost:8080/swagger-ui.html#!/genre/indexGenreUsingGET

[dilipkrish]

I agree. The first pass was to get it working with the right urls :)

[dilipkrish]

It works now as we'd expect let me know if you see issues.

[dilipkrish]

Also it can be eliminated via fixing the url mappings, which is a work around.