Add "club" param for xml_licence_b

Added "club" parameter for "xml_licence_b" route following API version 1.2 (26/08/2015).

It is now possible to check if a player (whose license is passed in the first parameter) exists in a specific club (whose number is passed in the second optionnal parameter).

Note: regarding error returns :

if a club number is passed and does not exist, the response status code is 500 (ServerException) => new fix in FFTTClient,
if both parameters are null/empty, a 400 status code error is thrown (missing parameter(s)),
otherwise, the return is a 200 with an empty return list of licences.

alamirault / fftt-api-src

Add "club" param for xml_licence_b #14