Fedora/Centos vagrant boxes updated

[Tirloni, Giovanni]

Hello,

  * Fedora 27 v20180524 - Includes GNOME 3.26.2, Firefox 59 and Chrome 66
  * CentOS 7 v20180524 - Updated to CentOS 7.5

Fedora 27 box tested successfully with fluid-project/infusion. CentOS7 was tested with GPII/nexus.

*Warning*: If you're doing development on GPII/universal, please stay with the previous Fedora 27 box due to issues in tests and Chrome 66 (see GPII-3077 for details).

Boxes have been built/tested with:

  * VirtualBox 5.2.12
  * vagrant 2.1.1

You can update them by running these commands:

  $ vagrant box update --box inclusivedesign/centos7
  $ vagrant box update --box inclusivedesign/fedora27

You projects will need to be destroyed and recreated, please make backups if needed (vagrant destroy; vagrant up).

To verify that all your boxes are up to date:

  $ vagrant box outdated --global

To remove old versions automatically:

  $ vagrant box prune

If you would like to downgrade a box (e.g. for GPII/universal):

  $ vagrant box remove inclusivedesign/fedora27
  $ vagrant box add inclusivedesign/fedora27 --box-version 20180330

Cheers,
Giovanni