Address `could not change directory to "/home/vagrant": Permission denied`

[yahonda]

This pull request addresses these default: could not change directory to "/home/vagrant": Permission denied errors during vagrant up.

• Without this change:

  default: installing PostgreSQL
  default: could not change directory to "/home/vagrant": Permission denied
  default: could not change directory to "/home/vagrant": Permission denied
  default: could not change directory to "/home/vagrant": Permission denied
  default: installing MySQL

• With this change:

  default: installing PostgreSQL
  default: installing MySQL