Fee calculations:

 - Calculates fees for claim type 2, i.e. non-discrimination and
   non-unfair-dissmissal claims
 - Adds Claim#alleges_discrimination_or_unfair_dismissal? which
   delgates through to ClaimDetail#alleges_discrimination_or_unfair_dismissal?
 - Adds ClaimDetail#alleges_discrimination_or_unfair_dismissal?