Replace default VBOX to bento/centos-6.7
Replace default VBOX to bento/centos-6.7

Chef has removed all of their boxes from atlas. They have left a comment here https://atlas.hashicorp.com/chef/ saying:
If you are looking for Bento boxes they now have their own organization https://atlas.hashicorp.com/bento/
Furthermore centos-6.6 is deprecated and no mirrors or patches are available anymore. 

So i've replaced the default VBOX from chef/centos-6.6 to bento/centos-6.7
tzolov/vagrant-pivotalhd,tzolov/vagrant-pivotalhd