Update Vagrant and Virtualbox versions, update test(s)
Add quotes around version number of virtualbox, add test for VB version in BATS
Change the virtualbox version check to be more specific
Add double dash for virtualbox to be more consistent
Merge pull request #29 from rightscale-cookbooks/white_13_09_acu141061_rs_cookbooks_ci_update_vagrant_virtualbox

Update Vagrant and Virtualbox versions, update test(s)