[DRE-maint] Bug#693845: ruby-hiera shouldn't recommend mcollective or puppet

[Matthaus Owens]

Package: ruby-hiera
Version: 1.0.0~rc3-1

Hiera has no use with mcollective, so it's unclear why mcollective is
recommended with ruby-hiera, except that the tools are written by the
same author. Hiera is used with puppet, but rather than hiera
recommending puppet it makes more sense for puppet to recommend hiera.
Both of these recommends mean that the majority of users (who have
recommends installed automatically) installing hiera will get puppet,
mco, ruby-dev, and a slew of other dependencies brought in.