Wrangling git submodules is a headache. The entire feature is cloaked in obscurity and is difficult to use well. Instead, we should:

1. Make mongo-ruby-spec-shared an internal gem (perhaps pulled in via github, rather than rubygems)
2. Update our build process to check out the driver tools, rather than embedding them as a submodule.

The same steps should be taken in Mongoid and bson-ruby, as well.