Fix Ruby tests

[drdrsh]

Build is failing with this error

Downloading activerecord-3.2.14 revealed dependencies not in the API or the
lockfile (activesupport (= 3.2.14), activemodel (= 3.2.14), arel (~> 3.0.2),
tzinfo (~> 0.3.29)).
Either installing with `--full-index` or running `bundle update activerecord`
should fix the problem.

After ActiveSupport was updated.

This PR fixes that