user roles and permissions endpoints are missing

[jkoidahl]

the following endpoints need to be created in the UserController:

get /api/v1/users/{userId}/roles

post /api/v1/users/{userId}/roles

get /api/v1/users/{userId}/permissions

delete /api/v1/users/{userId}/roles/{roleId}

get /api/v1/users/{userId}/roles/{roleId}