Remove duplicate gems listed in the Gemfile

Reorganizing, merging, or gremlins must have accidentally,
or intentionally (if the author really was a gremlin) changed
the code without glancing at the diff before committing or did
in fact look at the duplication and laugh BWAHAHA in a shrill,
high-pitched, raspy gremlin voice.  Remember: don't feed the mogwai
after midnight.  http://gremlins.wikia.com/wiki/Mogwai
Add mongoid version and ref in Gemfile for moped updates

We received several error e-mails a week at one point referring to
timeout errors.  After scaling up the size and performance of our
MongoDB instance we only received a few.  All of these were moped
socket errors.

So when mongoid maintainer, Durran Jordan (durran) recently made
commits on the 3.1.0-stable branch, updating the moped to version
1.5 in the mongod gemspec, I updated the rubeque Gemfile to point
to a specific, stable mongoid ref and version where changes related
to the moped errors had recently occurred.  That change and others
will likely remove the error altogether or clarify why it's happening
and perhaps how we can prevent it.

Signed-off-by: Michaux Kelley <michaux.kelley@scimedsolutions.com>