Upgrade to Vagrantfile v2

Updates vagrantfile generation to use the version 2 spec.
Some features in v1 are deprecated in the newer versions
of Vagrant. These Deprecation warnings affect the output of
ssh_config causing rspec-system to fail to configure the VM.
Merge pull request #46 from justenwalker/vagrantfile-v2

Upgrade to Vagrantfile v2
Release 2.2.1

Signed-off-by: Ken Barber <ken@bob.sh>
Merge branch 'release_221'

* release_221:
  Release 2.2.1