Missing jquery closure

This is related to #224. I missed swapping out jQuery for $ in one place.

I did a quick google to find rational for passing jQuery into the function: https://github.com/jquery-boilerplate/jquery-boilerplate/wiki/How-did-we-get-here%3F. The actual reason is because Drupal can't work with jvectormap in its current state without hacking the javascript first. See https://drupal.org/project/jvectormap