RFR (S): 8138750: Clean up survivor rate group

[Thomas Schatzl]

Hi,

On Tue, 2015-10-06 at 17:21 -0400, Tom Benson wrote:
> Hi Thomas,
> Cleanup looks fine to me, too.  Just one comment you can choose whether 
> to ignore:   it seems like the one-line body of 
> should_update_surv_rate_group_predictors could just as easily be inline 
> when the only use is  "bool update = should_update...... ", now in the 
> same module.  Unless you envision other uses.
> Tom

In this case I prefer the method as it is much more understandable in
the context of the method than the "complicated" actual term.

  thanks for the review.

Thanks,
  Thomas