Fix return type of some generated function
Fix return type of some generated function

EnableIndications and DisableIndications have returned void but should
return CMPIStatus instead.

kkaempf/konkretcmpi,kkaempf/konkretcmpi,rnovacek/konkretcmpi,rnovacek/konkretcmpi,kkaempf/konkretcmpi,rnovacek/konkretcmpi