Enhancement -- Roles (naming)

Role name, may contain any combination of the characters `[a-z A-Z 0-9 - + . @ %]`, when creating a role any other characters must be percent encoded, see: [https://en.wikipedia.org/wiki/Percent-encoding](https://en.wikipedia.org/wiki/Percent-encoding). 

 When passing a role name in a URL path it must be escaped again using percent encoding e.g. if a role is created with the name "0|59", the '|' character must first be percent-encoded resulting in "0%7C59". When using the same role name in a URL path it must be percent-encoded a second time resulting in "0%257C59"