more recent vagrant version is required, please update wiki

[nextstepman]

Hi SW 360 team,

I suggest that you add a hint in your wiki to actually use the latest vagrant version for installation. I started with vagrant 2.0.4 and installation failed. The wiki mentioned that at least vagrant 1.5 is required, which I think is misleading.
I tried again with latest (2.1.5) and that did the trick.

Also for Mac OS X it is important to have the readline command available, otherwise the scripts will fail. I installed it with "brew install coreutils". I suggest to add a hint for that too.

Greetings, Richard

p.s.: with vagrant 2.0.4 I got this error

==> sw360-xenial: Running provisioner: puppet...
The following SSH command responded with a non-zero exit status.
Vagrant assumes that this means the command failed!

cp /tmp/vagrant-puppet/vagrant_facts.yaml /etc/puppetlabs/facter/facts.d/vagrant_facts.yaml