Some vagrant boxes requires virtualbox guest additions

[juliendufresne]

I tried to test juliendufresne.influxdb role on bento/centos-6.7 but it fails.
After some investigations, this is due to the fact that virtualbox guest additions are not installed.

We need to have an option to install virtualbox guest additions for box that requires it.

Example of output:

Failed to mount folders in Linux guest. This is usually because
the "vboxsf" file system is not available. Please verify that
the guest additions are properly installed in the guest and
can work properly. The command attempted was:

mount -t vboxsf -o uid=id -u vagrant,gid=getent group vagrant | cut -d: -f3 vagrant /vagrant
mount -t vboxsf -o uid=id -u vagrant,gid=id -g vagrant vagrant /vagrant

The error output from the last command was:

mount: unknown filesystem type 'vboxsf'